Here is my weekly weather quiz question. What is the “Backwater Effect?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (“Arch”shape with blue arrows) is still dominating our weather picture. The graphics for days 3-7 show a frontal systems moving in from the northwest Friday through Monday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 177 in the Unhealthy category measuring Particulate Matter.

Oakridge: The Air Quality Index is 129 in the Unhealthy for Sensitive Groups category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 84 in the Moderate category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS FROM 2 PM THIS AFTERNOON UNTIL 10 PM THURSDAY FOR THE WILLAMETTE NATIONAL FOREST.
• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS FROM 3 PM THIS AFTERNOON UNTIL 10 PM FRIDAY FOR THE DDSCHUTES NATIONAL FOREST AND THE MINUS SISTERS RANGER DISTRICT.
• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS FROM NOON UNTIL 10 PM TONIGHT FOR THE UMPQUA BASIN, THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY, AND THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• A FIRE WEATHER WATCH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH THURSDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES, THE UMPQUA BASIN,  THE WESTERN ROGUE RIVER, THE SISKIYOU NATIONAL FOREST,  BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY,  THE SOUTHERN OREGON CASCADES. THE KLAMATH BASIN,  THE FREMONT-WINEMA NATIONAL FOREST,
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON FRIDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTES COUNTY AND JEFFERSON COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON WEDNESDAY FOR GILLIAM COUNTY, GRANT COUNTY, MORROW COUNTY, SHERMAN COUNTY, UMATILLA COUNTY, UNION COUNTY, WALLLOWA COUNTY, AND WHEELER COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON SATURDAY FOR DESCHUTES COUNTY AND JEFFERSON COUNTY.
• The Oregon Health Authority issued a Health Advisory today for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued July 28 for Howard Bay (also known locally as Howards Bay or Howard’s Bay), located in the southwest corner of Upper Klamath Lake, to include Shoalwater Bay to the north. These areas of Upper Klamath Lake are located off Oregon Route 140, 15 miles west of Klamath Falls in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in Howard Bay. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Howard Bay and Shoalwater Bay at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued Health Advisory for Agency Lake, located just north of Klamath Falls along U.S. Highway 97 in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the lake. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Agency Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory today for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• A mix of clouds and sun with patchy smoke this afternoon, partly cloudy with patchy smoke tonight,
• Partly cloudy with patchy smoke Thursday and at night,
• AM clouds, mostly sunny and a bit cooler Friday afternoon, then partly cloudy Friday night.
• highs 90-87 lows near 58.
• Partly cloudy and a bit cooler Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
• Mostly cloudy with a slight (20%) chance of showers Sunday and in the evening,  just mostly cloudy late Sunday night,
• Partly cloudy with a slight (20%) chance of showers Monday, then just partly cloudy Monday night and Tuesday.
• highs 86-78 lows 56-52. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms and a bit cooler this afternoon, patchy smoke with isolated evening thunderstorms, a (40%) chance of isolated thunderstorms with patchy smoke late tonight,
• Partly cloudy with patchy smoke and a bit cooler with a slight (20%) chance of  thunderstorms Thursday and evening, patchy smoke at night,
• Partly cloudy and a bit cooler Friday and Friday night.
• highs 95-90 lows 62-64 cooling to 60 Friday night.
• Sunny and a bit cooler Saturday, mostly clear with a slight (20%) chance of thunderstorms at night,
• Sunny Sunday AM, partly cloudy with a slight (20%) chance of showers and a bit cooler in the afternoon and evening, mostly cloudy with a slight (20%) chance of showers Sunday night and Monday AM, then partly cloudy and a bit cooler Monday afternoon through Tuesday.
• highs 88-82 lows near 56. (seasonal averages high 86 low 56)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy this afternoon patchy inland smoke, partly cloudy this evening and mostly cloudy with patchy inland smoke and a slight (20%) chance of isolated inland thunderstorms tonight, patchy fog late at night,
• Mostly cloudy with patchy AM coastal fog while patchy inland fog and smoke inland, partly cloudy Thursday afternoon and evening, just mostly cloudy late Thursday night,
• Mostly cloudy in the AM, partly cloudy Friday afternoon and at night.
• highs near 65 lows near 55.
• Partly cloudy Saturday, a slight (20%) chance of showers Saturday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Sunday afternoon through Monday AM, then just partly cloudy and a bit cooler Monday afternoon through Tuesday.
• highs near 65 lows near 55. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy and a bit cooler with patchy smoke and a (40%) chance of scattered showers and thunderstorms this afternoon and evening (under 0.10 in. of rain possible, more in storms), patchy smoke with a slight (20%) chance of showers and thunderstorms late tonight (under 0.10 in. of rain possible, more in storms),
• Partly cloudy with patchy smoke and a bit warmer with a (40%) chance of showers and thunderstorms Thursday afternoon (under 0.10 in. of rain possible, more in storms), patchy smoke with a good (50%) chance of showers and thunderstorms in the evening, patchy smoke with a slight (20%) chance of showers and thunderstorms late at night,
• Partly cloudy with patchy AM smoke and a slight (20%) chance of showers, a (40%) chance of showers and thunderstorms and a bit cooler Friday afternoon, a slight (20%) chance of evening showers and thunderstorms, then just partly cloudy late Friday night.
• snow level above 8,000 ft. today through Friday evening, then free air freezing level above 12,000 ft. late Friday night.
• highs near 78 lows 56-53.
• Partly cloudy in the AM, mostly sunny and a bit cooler with a slight (20%) chance of showers and thunderstorms Saturday afternoon and evening, partly cloudy late at night,
• Partly cloudy and a bit cooler Sunday with a slight (20%) chance of showers in the afternoon and Sunday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Monday and in the evening, then just partly cloudy late Monday night and Tuesday.
• free air freezing level above 12,000 ft. Saturday AM, snow level above 8,000 ft. Saturday afternoon and evening, free air freezing level above 12,000 ft. late Saturday night through Sunday night and Monday, then free air freezing level 11,000 ft. rising to 12,000 ft. Monday night and Tuesday.
• highs 74-63 warming to 65 Tuesday lows 49-43.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question. What is the “Backwater Effect?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (“Arch”shape with blue arrows) is still dominating our weather picture. The graphics for days 3-7 show a frontal systems moving in from the northwest Friday through Monday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 155 in the Unhealthy category measuring Particulate Matter.

Oakridge: The Air Quality Index is 96 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 147 in the Unhealthy for Sensitive Groups category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS UNTIL 10 PM TONIGHT FOR THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY, THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS FROM NOON UNTIL 10 PM WEDNESDAY FOR THE UMPQUA BASIN, THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY, AND THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• A FIRE WEATHER WATCH IS IN EFFECT FROM THURSDAY AFTERNOON THROUGH THURSDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES, THE UMPQUA BASIN,  THE WESTERN ROGUE RIVER, THE SISKIYOU NATIONAL FOREST,  BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY,  THE SOUTHERN OREGON CASCADES. THE KLAMATH BASIN,  THE FREMONT-WINEMA NATIONAL FOREST,
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON FRIDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTES COUNTY AND JEFFERSON COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL FURTHER NOTICE FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON WEDNESDAY FOR GILLIAM COUNTY, GRANT COUNTY, MORROW COUNTY, SHERMAN COUNTY, UMATILLA COUNTY, UNION COUNTY, WALLLOWA COUNTY, AND WHEELER COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON SATURTDAY FOR DESCHUTES COUNTY AND JEFFERSON COUNTY.
• The Oregon Health Authority issued a Health Advisory today for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued July 28 for Howard Bay (also known locally as Howards Bay or Howard’s Bay), located in the southwest corner of Upper Klamath Lake, to include Shoalwater Bay to the north. These areas of Upper Klamath Lake are located off Oregon Route 140, 15 miles west of Klamath Falls in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in Howard Bay. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Howard Bay and Shoalwater Bay at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued Health Advisory for Agency Lake, located just north of Klamath Falls along U.S. Highway 97 in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the lake. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Agency Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory today for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy with patchy smoke tonight,
• Partly cloudy in the AM, mostly sunny with patchy smoke Wednesday afternoon, partly cloudy with patchy smoke Wednesday night and Thursday AM, partly cloudy in the afternoon and at night,
• AM clouds, mostly sunny and a bit cooler Friday afternoon, then partly cloudy Friday night.
• lows near 60 highs 92-87.
• Partly cloudy and a bit cooler Saturday, partly cloudy with a slight (20%) chance of showers Saturday night through Monday evening, the just partly cloudy late Monday night and Tuesday.
• highs 86-78 lows 56-52. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms tonight and Wednesday (a bit cooler), patchy smoke scattered evening thunderstorms late Wednesday night,
• Partly cloudy with patchy smoke and a bit cooler with a slight (20%) chance of  thunderstorms Thursday and evening, patchy smoke at night,
• Partly cloudy and a bit cooler Friday and Friday night.
• lows 63-60 highs 95-92.
• Mostly sunny and a bit cooler Saturday, mostly clear at night,
• Sunny Sunday AM, partly cloudy with a slight (20%) chance of showers and a bit cooler in the afternoon and evening, mostly cloudy with a slight (20%) chance of showers Sunday night and Monday AM, then partly cloudy and a bit cooler Monday afternoon through Tuesday.
• highs 87-84 lows 57-60 cooling to 58 Tuesday. (seasonal averages high 86 low 56)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Partly cloudy this evening, mostly cloudy late tonight with patchy coastal fog late tonight while patchy inland smoke late at night,
• Cloudy with patchy AM coastal fog and partly cloudy Wednesday afternoon while patchy inland smoke and a slight (20%) chance of inland thunderstorms in the afternoon, partly cloudy in the evening and mostly cloudy with patchy inland smoke and a slight (20%) chance of isolated inland thunderstorms Wednesday night, patchy fog late at night,
• Mostly cloudy with patchy AM coastal fog while patchy inland fog and smoke inland, partly cloudy Thursday afternoon and evening, just mostly cloudy late Thursday night,
• Partly cloudy Friday and at night.
• lows near 55 highs near 65.
• Partly cloudy Saturday and Saturday night,
• Partly cloudy Sunday AM, mostly cloudy and a bit warmer with a slight (20%) chance of showers in the afternoon through Monday AM, then just partly cloudy and a bit cooler Monday afternoon through Tuesday.
• highs 65-69 cooling to 66 Monday lows near 56. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with patchy smoke and a slight (20%) chance of showers and thunderstorms this evening, partly cloudy with patchy smoke late tonight,
• Partly cloudy and a bit cooler with patchy smoke and a (30%) chance of showers and thunderstorms Wednesday afternoon and evening, a slight (20%) chance of showers and thunderstorms late at night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers and thunderstorms Thursday afternoon, a good (50%) chance of showers and thunderstorms in the evening, just partly cloudy late at night,
• Partly cloudy with a (40%) chance of afternoon showers and thunderstorms and a bit cooler Friday afternoon, a slight (20%) chance of evening showers and thunderstorms, then partly cloudy late Friday night.
• snow level above 8,000 ft. tonight through Thursday night, free air freezing level 12,000 ft. late Thursday night and Friday AM, snow level above 8,000 ft. Friday afternoon and evening, free air freezing level above 12,000 ft. late Friday night.
• lows 57-53 highs 80-77.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Saturday afternoon and evening, partly cloudy late at night,
• Partly cloudy and a bit cooler Sunday with a slight (20%) chance of showers in the afternoon and Sunday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers Monday and in the evening, then just partly cloudy late Monday night and Tuesday.
• free air freezing level above 12,000 ft. Saturday AM, snow level above 8,000 ft. Saturday afternoon and evening, free air freezing level above 12,000 ft. late Saturday night through Sunday night and Monday, then free air freezing level 11,000 ft. rising to 12,000 ft. Monday night and Tuesday.
• highs 74-62 lows 49-43.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question. What is the “Backwater Effect?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (“Arch”shape with blue arrows) is still dominating our weather picture. The graphics for days 3-7 show a couple of weak cold fronts moving in from the northwest next Saturday through Monday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 77 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 80 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 67 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS UNTIL 10 PM TONIGHT FOR THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY, AND THE SOUTHERN OREGON CASCADES.
• A FIRE WEATHER WATCH IS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, THE SISKIYOU MOUNTAINS, THE EASTERN ROGUE VALLEY,  THE SOUTHERN OREGON CASCADES. THE KLAMATH BASIN,  THE FREMONT-WINEMA NATIONAL FOREST,  THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM THIS EVENING FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTTES COUNTY AND JEFFERSON COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL FURTHER NOTICE FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON WEDNESDAY FOR GILLIAM COUNTY, GRANT COUNTY, MORROW COUNTY, SHERMAN COUNTY, UMATILLA COUNTY, UNION COUNTY, WALLLOWA COUNTY, AND WHEELER COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON SATURTDAY FOR DESCHUTES COUNTY AND JEFFERSON COUNTY.
• The Oregon Health Authority issued a Health Advisory today for Agency Lake, located just north of Klamath Falls along U.S. Highway 97 in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the lake. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Agency Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory today for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy and Hot today with more patchy smoke, partly cloudy with patchy smoke late tonight,
• Partly cloudy in the AM, mostly sunny and a bit cooler with patchy smoke Wednesday afternoon, partly cloudy with patchy smoke Wednesday night through Thursday AM, then partly cloudy in the afternoon through Friday night.
• highs 93-90 lows near 60.
• AM clouds, mostly sunny and a bit cooler Friday, partly cloudy at night,
• Then partly cloudy and a bit cooler Saturday through Monday,
• highs 86-84 lows 57-54. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms this afternoon and tonight,
• Partly cloudy with patchy smoke with a slight (20%) chance of isolated thunderstorms Wednesday and in the evening, isolated thunderstorms late Wednesday night,
• Partly cloudy and a bit cooler with isolated thunderstorms Thursday and at night.
• highs near 95 lows near 63.
• Partly cloudy and a bit cooler with isolated thunderstorms Friday, just party cloudy at night,
• Partly cloudy and a bit warmer Saturday through Sunday, then partly cloudy with a slight (20%) chance of showers Sunday night and Monday (a bit cooler).
• highs 92-82 lows 60-57 warming back to 60 Monday. (seasonal averages high 86 low 56)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Partly cloudy this afternoon at the shore while partly cloudy with patchy inland smoke and a slight (20%) chance of inland isolated thunderstorms and a bit cooler this afternoon and evening, patchy coastal fog late at night while patchy inland smoke tonight,
• Mostly cloudy with patchy AM coastal fog while patchy AM inland smoke Wednesday, partly cloudy with patchy inland smoke, just mostly cloudy at the shore at night while patchy evening inland smoke with a slight (20%) chance of isolated inland thunderstorms Wednesday night,
• Mostly cloudy with a slight (20%) of isolated thunderstorms in the AM, partly cloudy with a slight (20%) of isolated thunderstorms Thursday in the afternoon and evening, then just mostly cloudy late Thursday night.
• highs near 65 lows near 55.
• Partly cloudy and a bit cooler Friday through Sunday (a bit warmer Sunday), partly cloudy with a slight (20%) chance of showers Sunday night and Monday AM, then just partly cloudy and a bit cooler Monday afternoon.
• highs 64-66 cooling to 62 Monday lows 56-58. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy and a bit warmer with patchy smoke and a slight (20%) chance of showers and thunderstorms this afternoon and evening, partly cloudy with patchy smoke late tonight,
• Partly cloudy and a bit cooler with patchy smoke and a (30%) chance of showers and thunderstorms Wednesday afternoon and evening, a slight (20%) chance of showers and thunderstorms at night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers and thunderstorms Thursday afternoon and evening, then just partly cloudy late Thursday night.
• snow level above 8,000 ft. today through Thursday evening, then free air freezing level 12,000 ft. late Thursday night.
• highs 82-77 warming to 80 Thursday lows 57-55.
• Partly cloudy with a slight (20%) chance of afternoon showers and thunderstorms and a bit cooler Friday afternoon and evening, partly cloudy late at night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Saturday afternoon and evening, partly cloudy late at night and Sunday, a bit cooler Sunday afternoon, a slight (20%) chance of showers and thunderstorms late Sunday night,
• Then partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday.
• free air freezing level 12,000 ft. Friday AM, snow level above 8,000 ft. Friday afternoon and evening, free air freezing level above 12,000 ft. late Friday night and Saturday AM, snow level above 8,000 ft. Saturday afternoon and evening, free air freezing level above 12,000 ft. Saturday night through Sunday evening, then snow level above 8,000 ft. Late Sunday night and Monday.
• highs 76-70 lows 53-48.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question. What is the “Backwater Effect?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (“Arch”shape with blue arrows) is still dominating our weather picture. The graphics for days 3-7 show a couple of weak cold fronts moving in from the northwest next Saturday through Monday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 87 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 66 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 73 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT UNTIL 10 PM TONIGHT FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE KLAMATH BASIN,  THE FREMONT-WINEMA NATIONAL FOREST, THE UMPQUA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• A FIRE WEATHER WATCH IS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE KLAMATH BASIN,  THE FREMONT-WINEMA NATIONAL FOREST,  THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM TUESDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTTES COUNTY AND JEFFERSON COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL FURTHER NOTICE FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON WEDNESDAY FOR GILLIAM COUNTY, GRANT COUNTY, MORROW COUNTY, SHERMAN COUNTY, UMATILLA COUNTY, UNION COUNTY, WALLLOWA COUNTY, AND WHEELER COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON SATURTDAY FOR DESCHUTES COUNTY AND JEFFERSON COUNTY.
• The Oregon Health Authority issued a Health Advisory today for Agency Lake, located just north of Klamath Falls along U.S. Highway 97 in Klamath County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the lake. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Agency Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory today for Willow Creek Reservoir, located just east of the town of Heppner in Morrow County. Water monitoring has confirmed the presence of blue-green algae and the toxins they produce in the reservoir. These toxin concentrations can be harmful to humans and animals. People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue green or brownish red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur is discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified, or an advisory issued, can expose people to the toxins being produced. Although toxins are not absorbed through the skin, people who have skin sensitivities that come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Willow Creek Reservoir at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly clear with patchy smoke tonight,
• Partly cloudy and Hot Tuesday with more patchy smoke, partly cloudy with patchy smoke late at night and Wednesday AM, partly cloudy and a bit cooler with patchy smoke in the afternoon and evening, partly cloudy late Wednesday night through Thursday night.
• lows near 60 highs 93-90.
• Mostly sunny and a bit cooler Friday, partly cloudy at night,
• Then partly cloudy and a bit cooler Saturday through Monday,
• highs 86-84 lows 57-54. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms tonight,
• Partly cloudy with patchy smoke Tuesday and a slight (20%) chance of isolated thunderstorms in the afternoon and Tuesday night,
• Partly cloudy with patchy smoke with a slight (20%) chance of isolated thunderstorms Wednesday and in the evening, isolated thunderstorms late Wednesday night,
• Partly cloudy and a bit cooler with isolated thunderstorms Thursday and at night.
• lows near 63 highs near 95.
• Partly cloudy and a bit cooler with isolated showers Friday, just party cloudy at night,
• Partly cloudy and a bit warmer Saturday through Sunday, then partly cloudy with a slight (20%) chance of showers Sunday night and Monday (a bit cooler).
• highs 92-82 lows 60-57 warming back to 60 Monday. (seasonal averages high 86 low 56)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Partly cloudy this evening and mostly cloudy late tonight with patchy coastal fog while patchy inland smoke and a slight (20%) chance of inland thunderstorms tonight,
• Partly cloudy with patchy AM coastal fog and partly cloudy Tuesday afternoon while partly cloudy with patchy inland smoke and a slight (20%) chance of inland isolated thunderstorms and a bit cooler Tuesday afternoon and evening, patchy coastal fog late at night while patchy inland smoke Tuesday night,
• Mostly cloudy with patchy AM coastal fog while patchy AM inland smoke Wednesday, partly cloudy with patchy inland smoke, just mostly cloudy at the shore at night while patchy evening inland smoke with a slight (20%) chance of isolated inland thunderstorms Wednesday night,
• Mostly cloudy with a slight (20%) of isolated thunderstorms in the AM, partly cloudy with a slight (20%) of isolated thunderstorms Thursday in the afternoon and evening, then just mostly cloudy late Thursday night.
• lows near 55 highs near 65.
• Partly cloudy and a bit cooler Friday through Sunday (a bit warmer Sunday), partly cloudy with a slight (20%) chance of showers Sunday night and Monday AM, then just partly cloudy and a bit cooler Monday afternoon.
• highs 64-66 cooling to 62 Monday lows 56-58. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with patchy smoke and a slight (20%) chance of showers and thunderstorms this evening, just partly cloudy with patchy smoke late tonight,
• Partly cloudy and a bit warmer with patchy smoke and a slight (20%) chance of showers and thunderstorms Tuesday afternoon and evening, partly cloudy with patchy smoke late at night,
• Partly cloudy and a bit cooler with patchy smoke and a (30%) chance of showers and thunderstorms Wednesday afternoon and evening, a slight (20%) chance of showers and thunderstorms at night,
• Partly cloudy and a bit warmer with a slight (20%) chance of showers and thunderstorms Thursday afternoon and evening, then just partly cloudy late Thursday night.
• snow level above 8,000 ft. tonight through Thursday evening, then free air freezing level 12,000 ft. late Thursday night.
• lows 58-55 highs 79-77 warming to 80 Thursday.
• Partly cloudy with a slight (20%) chance of afternoon showers and thunderstorms and a bit cooler Friday afternoon and evening, partly cloudy late at night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Saturday afternoon and evening, partly cloudy late at night and Sunday, a bit cooler Sunday afternoon, a slight (20%) chance of showers and thunderstorms late Sunday night,
• Then partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday.
• free air freezing level 12,000 ft. Friday AM, snow level above 8,000 ft. Friday afternoon and evening, free air freezing level above 12,000 ft. late Friday night and Saturday AM, snow level above 8,000 ft. Saturday afternoon and evening, free air freezing level above 12,000 ft. Saturday night through Sunday evening, then snow level above 8,000 ft. Late Sunday night and Monday.
• highs 76-70 lows 53-48.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my new weekly weather quiz question. What is the “Backwater Effect?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (“Arch”shape with blue arrows) is still dominating our weather picture. The graphics for days 3-7 show a couple of weak cold fronts moving in from the northwest next Sunday and Monday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 64 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 45 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 55 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT UNTIL 10 PM TONIGHT FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE KLAMATH BASIN,  THE FREMONT-WINEMA NATIONAL FOREST, THE UMPQUA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM TUESDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTTES COUNTY AND JEFFERSON COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL FURTHER NOTICE FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON WEDNESDAY FOR DESCHUTES COUNTY, JEFFERSON COUNTY, GILLIAM COUNTY, GRANT COUNTY, MORROW COUNTY, SHERMAN COUNTY, UMATILLA COUNTY, UNION COUNTY, WALLLOWA COUNTY, AND WHEELER COUNTY.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• A mix of clouds and sun and a bit warmer, hot, with patchy smoke this afternoon, partly cloudy with patchy smoke tonight,
• Partly cloudy and Hot Tuesday with patchy smoke, partly cloudy with patchy smoke late at night and Wednesday AM, mostly sunny and a bit cooler with patchy smoke in the afternoon and evening, partly cloudy with patchy smoke late Wednesday night.
• highs 92-94 cooling back to 92 Wednesday lows 59-57 warming back to 59 Wednesday.
• Partly cloudy and a bit cooler Thursday and Thursday night,
• Mostly sunny and a bit cooler Friday, partly cloudy at night,
• Then partly cloudy and a bit cooler Saturday through Sunday.
• highs 90-83 lows 58-56. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms and a bit warmer this afternoon through Tuesday evening, partly cloudy with patchy smoke Tuesday night,
• Partly cloudy with patchy smoke and a bit cooler with a slight (20%) chance of isolated thunderstorms Wednesday and Wednesday night.
• highs 95-93 lows near 62.
• Partly cloudy and a bit cooler with isolated thunderstorms Thursday, a slight (20%) chance of evening thunderstorms, mostly clear late Thursday night,
• AM sun, partly cloudy and a bit cooler Friday afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Saturday, mostly clear at night,
• Sunny Sunday AM, then partly cloudy and a bit warmer Sunday afternoon.
• highs 89-86 warming to 90 Sunday lows 62-57. (seasonal averages high 86 low 56)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy with patchy AM fog while patchy inland AM smoke, mostly sunny and a bit cooler with patchy inland smoke this afternoon, partly cloudy with patchy evening coastal fog while party cloudy with patchy inland smoke and a slight (20%) chance of inland thunderstorms late tonight,
• Partly cloudy with patchy AM coastal fog, patchy inland smoke with a slight (20%) chance of inland isolated thunderstorms and a bit cooler Tuesday afternoon and evening, patchy coastal fog late at night while patchy inland smoke Tuesday night,
• Mostly cloudy with patchy AM fog, partly cloudy patchy smoke with a slight (20%) chance of isolated thunderstorms Wednesday afternoon and at night.
• highs 65-63 lows near 55.
• Mostly cloudy in the AM, partly cloudy with a slight (20%) of isolated thunderstorms Thursday AM, just partly cloudy afternoon and Thursday night,
• Then partly cloudy and a bit cooler Friday through Sunday.
• highs 69-63 warming to 65 Sunday lows near 55. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy and a bit warmer with patchy smoke and a slight (20%) chance of showers and thunderstorms this afternoon and evening, just partly cloudy with patchy smoke late tonight,
• Partly cloudy and a bit warmer with patchy smoke and a slight (20%) chance of showers and thunderstorms Tuesday afternoon and evening, partly cloudy with patchy smoke late at night,
• Partly cloudy with patchy smoke and a slight (20%) chance of showers and thunderstorms Wednesday and at night.
• snow level above 8,000 ft. today and tonight, free air freezing level above 12,000 ft. Tuesday AM, snow level above 8,000 ft. Tuesday afternoon and Tuesday night, free air freezing level above 12,000 ft. Wednesday AM, then snow level above 8,000 ft Wednesday afternoon and Wednesday night.
• highs 80-82 lows 57-55.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Thursday and in the evening, just partly cloudy late Thursday night,
• Partly cloudy with a slight (20%) chance of afternoon showers and thunderstorms and a bit cooler Friday afternoon and evening, partly cloudy late at night,
• Then partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Saturday afternoon and evening, partly cloudy at night,
• Then partly cloudy and a bit cooler Sunday.
• snow level above 8,000 ft. Thursday and Thursday evening, free air freezing level 12,000 ft. late Thursday night and Friday AM, snow level above 8,000 ft. Friday afternoon and evening, free air freezing level above 12,000 ft. late Friday night and Saturday AM, then snow level above 8,000 ft. Saturday afternoon and evening, then free air freezing level above 12,000 ft. Saturday night and Sunday.
• highs 82-73 lows 54-52.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What are “Backing Winds?” Here is the correct answer. Backing Winds are winds which shift in a counterclockwise direction with time at a given location (e.g. from southerly to southeasterly), or change direction in a counterclockwise sense with height (e.g. westerly at the surface but becoming more southerly aloft). The opposite of veering winds. I’ll have a new weekly weather quiz question for you starting Monday. The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (“Arch”shape with blue arrows) is still dominating our weather picture. The graphics for days 3-7 show a couple of weak cold fronts moving in from the northwest next Sunday and Monday.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 58 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 50 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 45 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE KLAMATH BASIN AND THE FREMONT-WINEMA NATIONAL FOREST.
• A RED FLAG WARNING IS IN EFFECT FROM NOON UNTIL 10 PM MONDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE UMPQUA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM TUESDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTTES COUNTY AND JEFFERSON COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL FURTHER NOTICE FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL NOON WEDNESDAY FOR DESCHUTES COUNTY, JEFFERSON COUNTY, GILLIAM COUNTY, GRANT COUNTY, MORROW COUNTY, SHERMAN COUNTY, UMATILLA COUNTY, UNION COUNTY, WALLLOWA COUNTY, AND WHEELER COUNTY.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Partly cloudy with patchy smoke tonight,
• AM clouds with patchy smoke, mostly sunny and a bit warmer, hot, with patchy smoke Monday afternoon and Monday night,
• Partly cloudy and Hot Tuesday with patchy smoke, partly cloudy with patchy smoke late at night and Wednesday AM, mostly sunny and a bit cooler with patchy smoke in the afternoon and evening, just partly cloudy late Wednesday night.
• lows 59-57 warming back to 59 Wednesday highs 92-94 cooling back to 92 Wednesday.
• Partly cloudy and a bit cooler Thursday and Thursday night,
• Mostly sunny and a bit cooler Friday, partly cloudy at night,
• Then partly cloudy and a bit cooler Saturday through Sunday.
• highs 90-83 lows 58-56. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Partly cloudy with patchy smoke and a slight (20%) chance of isolated evening thunderstorms, patchy smoke tonight,
• Partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms and a bit warmer Monday afternoon through Tuesday evening, partly cloudy with patchy smoke Tuesday night,
• Partly cloudy with patchy smoke and a bit cooler with a slight (20%) chance of isolated thunderstorms Wednesday and Wednesday night.
• lows 60-62 highs 95-97.
• Partly cloudy and a bit cooler with isolated thunderstorms Thursday, a slight (20%) chance of evening thunderstorms, mostly clear late Thursday night,
• AM sun, partly cloudy and a bit cooler Friday afternoon, mostly clear at night,
• Mostly sunny and a bit warmer Saturday, mostly clear at night,
• Sunny Sunday AM, then partly cloudy and a bit warmer Sunday afternoon.
• highs 89-86 warming to 90 Sunday lows 62-57. (seasonal averages high 86 low 56)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Partly cloudy this evening and mostly cloudy with patchy coastal fog late tonight while patchy inland smoke tonight,
• Mostly cloudy with patchy AM fog while patchy inland AM smoke, mostly sunny and a bit cooler with patchy inland smoke Monday afternoon, partly cloudy with patchy evening coastal fog while party cloudy with patchy inland smoke and a slight (20%) chance of inland thunderstorms late at night,
• Partly cloudy with patchy AM coastal fog, patchy inland smoke with a slight (20%) chance of inland isolated thunderstorms and a bit cooler Tuesday afternoon and evening, patchy coastal fog late at night while patchy inland smoke Tuesday night,
• Mostly cloudy with patchy AM fog, partly cloudy patchy smoke with a slight (20%) chance of isolated thunderstorms Wednesday afternoon and at night.
• lows near 55 highs 67-65 warming back to 67 Tuesday.
• Mostly cloudy in the AM, partly cloudy with a slight (20%) of isolated thunderstorms Thursday AM, just partly cloudy afternoon and Thursday night,
• Then partly cloudy and a bit cooler Friday through Sunday.
• highs near 65 lows near 55. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy with a slight (20%) chance of evening showers and thunderstorms, patchy smoke tonight,
• Partly cloudy and a bit warmer with patchy smoke and a slight (20%) chance of showers and thunderstorms Monday afternoon and evening, just partly cloudy with patchy smoke late Monday night,
• Partly cloudy and a bit warmer with patchy smoke and a slight (20%) chance of showers and thunderstorms Tuesday afternoon and evening, partly cloudy with patchy smoke late at night,
• Partly cloudy with patchy smoke and a slight (20%) chance of showers and thunderstorms Wednesday and at night.
• snow level above 8,000 ft. tonight through Monday  night, free air freezing level above 12,000 ft. Tuesday AM, snow level above 8,000 ft. Tuesday afternoon and Tuesday night, free air freezing level above 12,000 ft. Wednesday AM, then snow level above 8,000 ft Wednesday afternoon and Wednesday night.
• lows 57-55 highs 80-82.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Thursday and in the evening, just partly cloudy late Thursday night,
• Partly cloudy with a slight (20%) chance of afternoon showers and thunderstorms and a bit cooler Friday afternoon and evening, partly cloudy late at night,
• Then partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Saturday afternoon and evening, partly cloudy at night,
• Then partly cloudy and a bit cooler Sunday.
• snow level above 8,000 ft. Thursday and Thursday evening, free air freezing level 12,000 ft. late Thursday night and Friday AM, snow level above 8,000 ft. Friday afternoon and evening, free air freezing level above 12,000 ft. late Friday night and Saturday AM, then snow level above 8,000 ft. Saturday afternoon and evening, then free air freezing level above 12,000 ft. Saturday night and Sunday.
• highs 82-73 lows 54-52.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What are “Backing Winds?” Here is the correct answer. Backing Winds are winds which shift in a counterclockwise direction with time at a given location (e.g. from southerly to southeasterly), or change direction in a counterclockwise sense with height (e.g. westerly at the surface but becoming more southerly aloft). The opposite of veering winds. I’ll have a new weekly weather quiz question for you starting Monday. The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (Shaded “Arch”shape with blue arrows) is still dominating our weather picture.  The very slow cooling began Friday with some onshore airflow, but we start to warm back up pretty quickly by Sunday. The graphics for days 1-3 show a backdoor front attempting to move from the northeast to southwest into Oregon.

Note: Eugene set a new record high for Wednesday with 102 and the same for Thursday, Roseburg set a new record of 108 Wednesday and again Thursday, and North Bend set a record high Wednesday of 85 but no record Thursday.  We’ve lost the triple digit highs, but you should still take proper precautions to keep hydrated and cool.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 36 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 41 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 37 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 11 PM SUNDAY FOR THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
• A FIRE WEATHER WATCH IS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE UMPQUA NATIONAL FOREST.
• A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM TUESDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTTES COUNTY AND JEFFERSON COUNTY.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly clear tonight,
• Mostly sunny and a bit warmer with patchy smoke Sunday afternoon, mostly clear with patchy smoke at night,
• AM clouds with patchy smoke, mostly sunny and a bit warmer with patchy smoke Monday afternoon, partly cloudy with patchy smoke Monday night,
• Partly cloudy Tuesday and at night.
• lows 55-58 highs 92-94.
• Partly cloudy Wednesday AM, mostly sunny and a bit cooler in the afternoon, mostly clear Wednesday night,
• Mostly sunny and a bit cooler Thursday, Friday, and Saturday, mostly clear Thursday night, partly cloudy Friday night.
• highs 92-89 lows near 58. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Mostly cloudy this evening, partly cloudy late tonight with patchy smoke,
• AM sun, partly cloudy and a bit warmer with patchy smoke Sunday afternoon, a slight (20%) chance of isolated evening thunderstorms, patchy smoke late at night,
• Partly cloudy with patchy AM smoke, a slight (20%) chance of isolated thunderstorms Monday afternoon through Tuesday afternoon (a bit warmer) and Tuesday night.
• lows 59-64 highs 95-97.
• Partly cloudy and a bit cooler with a slight (20%) chance of isolated thunderstorms Wednesday through Thursday evening, mostly clear Thursday night,
• AM sun, partly cloudy Friday afternoon, mostly clear at night,
• Then mostly sunny Saturday.
• highs 95-93 lows near 62. (seasonal averages high 86 low 57)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Mostly cloudy with patchy coastal fog late while patchy inland smoke tonight,
• Mostly cloudy Sunday with patchy inland smoke, partly cloudy in the evening and mostly cloudy with patchy coastal fog late at night while patchy inland smoke Sunday night,
• Mostly cloudy with patchy AM fog while patchy inland AM smoke, mostly sunny Monday afternoon, partly cloudy at the shore while party cloudy with a slight (20%) chance of inland thunderstorms at night,
• Then partly cloudy with a slight (20%) chance of isolated thunderstorms Tuesday and Tuesday night.
• lows near 55 highs 67-65 warming back to 67 Tuesday.
• Partly cloudy with a slight (20%) chance of isolated thunderstorms Wednesday, mostly cloudy with a slight (20%) Wednesday night and Thursday, then just partly cloudy Thursday night through Saturday.
• highs near 65 lows near 55. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy tonight,
• Mostly sunny in the AM, partly cloudy with patchy smoke Sunday afternoon, partly cloudy with a slight (20%) chance of evening showers and thunderstorms, patchy smoke at night,
• Partly cloudy with patchy smoke and a slight (20%) chance of showers and thunderstorms Monday afternoon and evening, just partly cloudy late Monday night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Tuesday afternoon and in the evening, partly cloudy late at night.
• free air freezing level above 12,000 ft. tonight and Sunday, snow level above 8,000 ft. Sunday night through Tuesday evening, free air freezing level above 12,000 ft. late Tuesday night.
• lows 55-53 highs near 80.
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Wednesday afternoon through Thursday evening, partly cloudy Thursday night,
• Partly cloudy with a slight (20%) chance of afternoon showers and thunderstorms Friday and in the evening, just partly cloudy late at night,
• Then partly cloudy with a slight (20%) chance of showers and thunderstorms Saturday afternoon.
• free air freezing level above 12,000 ft. Wednesday AM, snow level above 8,000 ft. Wednesday afternoon and evening, free air freezing level late Wednesday night through Thursday evening, free air freezing level 12,000 ft. late Thursday night and Friday AM, snow level above 8,000 ft. Friday afternoon, free air freezing level above 12,000 ft. Friday night and Saturday AM, then snow level above 8,000 ft. Saturday afternoon.
• highs near 80 lows near 53.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question for the last time. What are “Backing Winds?” Here is the correct answer. Backing Winds are winds which shift in a counterclockwise direction with time at a given location (e.g. from southerly to southeasterly), or change direction in a counterclockwise sense with height (e.g. westerly at the surface but becoming more southerly aloft). The opposite of veering winds. I’ll have a new weekly weather quiz question for you starting Monday. The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (Shaded “Arch”shape with blue arrows) is still dominating our weather picture.  The very slow cooling began Friday with some onshore airflow, but we start to warm back up pretty quickly by Sunday. The graphics for days 1-3 show a backdoor front attempting to move from the northeast to southwest into Oregon.

Note: Eugene set a new record high for Wednesday with 102 and the same for Thursday, Roseburg set a new record of 108 Wednesday and again Thursday, and North Bend set a record high Wednesday of 85 but no record Thursday.  We’ve lost the triple digit highs, but you should still take proper precautions to keep hydrated and cool.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 38 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 62 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 52 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM TUESDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTTES COUNTY AND JEFFERSON COUNTY.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Health Advisory for Odel Lake, located 75 miles southeast of Eugene off highway 58  in the northwest corner of Klamath County HAS BEEN LIFTED. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, Oregon Health officials advise recreational visitors to always be alert to signs of algae blooms in all Oregon waters, because blooms can develop and disappear throughout the season. Only a fraction of the many lakes and waterways in Oregon are monitored for blue-green algae by state, federal and local agencies, therefore, you are your own best advocate when it comes to keeping you and your family safe.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly sunny and still hot with smokey haze decreasing but a bit cooler this afternoon, mostly clear tonight,
• Mostly sunny and a bit warmer, Hot again, with patchy smoke Sunday, mostly clear with patchy smoke at night,
• AM clouds, mostly sunny Monday afternoon, then partly cloudy with patchy smoke Monday night.
• highs 88-94 lows 55-60.
• Partly cloudy and a bit cooler Tuesday through Wednesday AM, mostly sunny and a bit cooler in the afternoon, mostly clear Wednesday night,
• Then mostly sunny and a bit cooler Thursday and Friday, mostly clear Thursday night.
• highs 93-89 lows near 58. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Sunny and a bit cooler, still hot, with patchy smoke this afternoon, partly cloudy this evening, mostly clear late tonight with patchy smoke,
• Sunny and a bit warmer with patchy smoke Sunday, partly cloudy with a slight (20%) chance of isolated evening thunderstorms, mostly clear with patchy smoke at night,
• Partly cloudy with patchy AM smoke, then a slight (20%) chance of thunderstorms Monday afternoon and at night.
• highs near 95 lows near 62.
• Partly cloudy with a slight (20%) chance of thunderstorms Tuesday through Thursday night,
• Then sunny and a bit cooler Friday.
• highs 96-93 lows 64-62. (seasonal averages high 86 low 57)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Sunny this afternoon with patchy inland smoke, partly cloudy with patchy coastal fog late while patchy inland smoke tonight,
• Mostly cloudy in the AM, mostly sunny Sunday afternoon with patchy inland smoke, partly cloudy in the evening mostly cloudy with patchy coastal fog late at night while patchy inland smoke Sunday night,
• Mostly cloudy with patchy AM fog, partly cloudy Monday afternoon, then a slight (20%) chance of thunderstorms at night.
• highs near 66 lows near 55.
• Partly cloudy with a slight (20%) chance of thunderstorms Tuesday and Tuesday night,
• Partly cloudy with a slight (20%) chance of thunderstorms Wednesday and at night,
• Then just partly cloudy Thursday through Friday.
• highs near 65 lows near 55. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Partly cloudy and a bit cooler with patchy smoke this afternoon, partly cloudy tonight,
• Mostly sunny in the AM, partly cloudy and a bit cooler with patchy smoke Sunday afternoon and at night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday afternoon and Monday night, patchy evening smoke.
• free air freezing level above 12,000 ft. today through Sunday, snow level above 8,000 ft. Sunday night through Monday night.
• highs 80-82 lows 53-55.
• Partly cloudy with a slight (20%) chance of showers and thunderstorms and a bit cooler Tuesday  and in the evening, just partly cloudy late Tuesday night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Wednesday afternoon and evening, partly cloudy late at night,
• Partly cloudy Thursday with a slight (20%) chance of afternoon and evening showers and thunderstorms, partly cloudy Thursday night,
• Then partly cloudy with a slight (20%) chance of afternoon showers and thunderstorms Friday.
• snow level above 8,000 ft. Tuesday in the evening, free air freezing level above 12,000 ft. late Tuesday night and Wednesday AM, snow level above 8,000 ft. Wednesday afternoon and evening, free air freezing level late Wednesday night and Thursday AM, snow level above 8,000 ft. Thursday afternoon and evening, free air freezing level 12,000 ft. late Thursday night and Friday AM, then snow level above 8,000 ft. Friday afternoon.
• highs near 80 lows near 53.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question. What are “Backing Winds?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (Shaded “Arch”shape with blue arrows) is still dominating our weather picture.  The very slow cooling began today with some onshore airflow, but we start to warm back up pretty quickly. The graphics for days 1-3 show a backdoor front attempting to move from the northeast to southwest into Oregon.

Note: Eugene set a new record high for Wednesday with 102 and the same for Thursday, Roseburg set a new record of 108 Wednesday and again Thursday, and North Bend set a record high Wednesday of 85 but no record Thursday.  We’ve lost the triple digit highs, but you should still take proper precautions to keep hydrated and cool.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 85 in the Moderate category measuring Particulate Matter.

Oakridge: The Air Quality Index is 93 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 71 in the Moderate category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

• A RED FLAG WARNING IS IN EFFECT UNTIL 9 PM THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DESCHUTES NATIONAL FOREST, THE MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN OREGON CASCADES, THE CENTRAL MOUNTAINS OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
• A FIRE WEATHER WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE KLAMATH BASIN, AND THE FREMONT-WINEMA NATIONAL FOREST.
• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM TUESDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY, MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY,  CLARK COUNTY, DESCHUTTES COUNTY AND JEFFERSON COUNTY.
• AN HEAT ADVISORY IS IN EFFECT THROUGH 9 PM TONIGHT FOR THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, AND THE WESTERN COLUMBIA RIVER GORGE, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE NORTHERN OREGON CASCADES, AND THE CASCADES IN LANE COUNTY.
• AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 9 PM TONIGHT FOR THE CENTRAL COLUMBIA RIVER GORGE AND THE UPPER HOOD RIVER VALLEY.
• AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 8 PM THIS EVENING FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS,  THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Health Advisory for Odel Lake, located 75 miles southeast of Eugene off highway 58  in the northwest corner of Klamath County HAS BEEN LIFTED. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, Oregon Health officials advise recreational visitors to always be alert to signs of algae blooms in all Oregon waters, because blooms can develop and disappear throughout the season. Only a fraction of the many lakes and waterways in Oregon are monitored for blue-green algae by state, federal and local agencies, therefore, you are your own best advocate when it comes to keeping you and your family safe.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Mostly clear with patchy smoke tonight,
• Patchy AM smoke, mostly sunny and still hot but a bit cooler Saturday, partly cloudy Saturday night,
• Mostly sunny and a bit warmer, Hot again, Sunday, mostly clear at night,
• Mostly sunny Monday, then partly cloudy Monday night.
• lows 53-60 highs 90-95.
• Partly cloudy and a bit cooler Tuesday through Wednesday AM, mostly sunny and a bit cooler in the afternoon, mostly clear Wednesday night,
• Then mostly sunny and a bit cooler Thursday and Friday, mostly clear Thursday night.
• highs 93-89 lows near 58. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count

Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Mostly clear with patchy smoke tonight,
• Sunny and a bit cooler, still hot, with patchy smoke Saturday, partly cloudy in the evening, mostly clear Saturday night with patchy smoke,
• Patchy AM smoke, sunny and a bit warmer Sunday afternoon, partly cloudy with a slight (20%) chance of evening thunderstorms, mostly clear with patchy smoke at night,
• Partly cloudy with patchy AM smoke, then a slight (20%) chance of thunderstorms Monday afternoon and at night.
• lows 57-63 highs near 95.
• Partly cloudy with a slight (20%) chance of thunderstorms Tuesday through Thursday night,
• Then sunny and a bit cooler Friday.
• highs 96-93 lows 64-62. (seasonal averages high 86 low 57)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Partly cloudy with patchy coastal fog late tonight while partly cloudy with inland smoke tonight,
• Mostly cloudy with patchy AM coastal fog and sunny Saturday afternoon while sunny with patchy inland smoke, partly cloudy with patchy coastal fog late while patchy inland smoke at night,
• Mostly cloudy in the AM, mostly sunny Sunday afternoon with patchy inland smoke, partly cloudy in the evening mostly cloudy with patchy coastal fog late at night while patchy inland smoke Sunday night,
• Mostly cloudy with patchy AM fog, partly cloudy Monday afternoon, then a slight (20%) chance of thunderstorms at night.
• lows near 55 highs near 66.
• Partly cloudy with a slight (20%) chance of thunderstorms Tuesday and Tuesday night,
• Partly cloudy with a slight (20%) chance of thunderstorms Wednesday through Thursday night,
• Then Partly cloudy Friday.
• highs near 65 lows near 55. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Mostly clear with patchy evening smoke, mostly clear late tonight,
• AM sun, partly cloudy and a bit cooler with patchy smoke Saturday, partly cloudy at night,
• Mostly sunny in the AM, partly cloudy and a bit cooler Sunday afternoon and Sunday night,
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday afternoon and evening, then just partly cloudy late Monday night.
• free air freezing level above 12,000 ft. tonight through Sunday night, snow level above 8,000 ft. Monday and Monday night.
• lows 50-55 highs 84-80.
• Partly cloudy with a slight (20%) chance of showers and thunderstorms and a bit cooler Tuesday afternoon and evening, just partly cloudy late Tuesday night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Wednesday afternoon and evening, partly cloudy late at night,
• Partly cloudy Thursday with a slight (20%) chance of afternoon and evening showers and thunderstorms, partly cloudy Thursday night,
• Partly cloudy with a slight (20%) chance of afternoon showers and thunderstorms Friday.
• snow level above 8,000 ft. Tuesday through Friday.
• highs near 80 lows near 53.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________

Here is my weekly weather quiz question. What are “Backing Winds?” The first person to post the correct answer as a comment on this page will win a week of free personalized weather forecasts tailored to your needs.  Good luck.

________________

 

An Upper Level High Pressure Ridge (Shaded “Arch”shape with blue arrows) is still dominating our weather picture.  The very slow cooling begins today with some onshore airflow, but we start to warm back up pretty quickly. The graphics for days 1-3 show a backdoor front attempting to move from the northeast to southwest into Oregon.

Note: Eugene set a new record high for Wednesday with 102 and the same for Thursday, Roseburg set a new record of 108 Wednesday and again Thursday, and North Bend set a record high Wednesday of 85 but no record Thursday.  Still hot, but we”ll cool down a bit Friday. Take proper precautions to keep hydrated and cool.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 151 in the Unhealthy category measuring Particulate Matter.

Oakridge: The Air Quality Index is 143 in the Unhealthy for Sensitive Groups category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 130 in the Unhealthy for Sensitive Groups category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

__________________

Advisories:

• AN AIR  QUALITY ALERT IS IN EFFECT UNTIL 7 PM TUESDAY FOR BENTON COUNTY, CLACKAMAS COUNTY, CLATSOP COUNTY, COLUMBIA COUNTY, HOOD RIVER COUNTY, LANE COUNTY, LINCOLN COUNTY, LINN COUNTY. MARION COUNTY, MULTNOMAH COUNTY, POLK COUNTY, TILLAMOOK COUNTY, WASHINGTON COUNTY, YAMHILL COUNTY, AND CLARK COUNTY.
• AN HEAT ADVISORY IS IN EFFECT THROUGH 9 PM TONIGHT FOR THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY, AND THE WESTERN COLUMBIA RIVER GORGE, THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE NORTHERN OREGON CASCADES, AND THE CASCADES IN LANE COUNTY.
• AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 9 PM TONIGHT FOR THE CENTRAL COLUMBIA RIVER GORGE AND THE UPPER HOOD RIVER VALLEY.
• AN EXCESSIVE HEAT WARNING IS IN EFFECT UNTIL 8 PM THIS EVENING FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS,  THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN LAKE COUNTY.
• The Oregon Health Authority issued a Health Advisory for Coffenbury Lake, located at Fort Stevens State Park about five miles northwest of US-101 ALT, Northwest Ridgefield Road near Warrenton in Clatsop County. Water monitoring has confirmed the presence of blue-green algae that can produce toxins in Coffenbury Lake. These blue-green algae levels are likely to be associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals.  People should always avoid areas with visible scum that looks foamy, scummy, thick like paint, pea-green, blue-green or brownish-red. Swimming and high-speed water activities such as water skiing or power boating where ingestion and inhalation exposure can occur are discouraged. Swallowing or inhaling water droplets as a result of these water activities in areas where a bloom has been identified or an advisory issued, can expose people to the toxins that can be produced. Although toxins are not absorbed through the skin, people with skin sensitivities who come into contact with a bloom may experience a puffy, red rash at the affected area. Drinking water directly from Coffenbury Lake at this time is especially dangerous. OHA Public Health Division officials advise campers and other recreational visitors that toxins cannot be removed by boiling, filtering or treating water with camping-style filters.
• The Health Advisory for Odel Lake, located 75 miles southeast of Eugene off highway 58  in the northwest corner of Klamath County HAS BEEN LIFTED. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, Oregon Health officials advise recreational visitors to always be alert to signs of algae blooms in all Oregon waters, because blooms can develop and disappear throughout the season. Only a fraction of the many lakes and waterways in Oregon are monitored for blue-green algae by state, federal and local agencies, therefore, you are your own best advocate when it comes to keeping you and your family safe.
• The Oregon Health Authority has updated the Health Advisory issued June 30 for Lake Billy Chinook, located about 12 miles west of Madras in Jefferson County. The update lifts the advisory on those areas of the Deschutes and Crooked River of Lake Billy Chinook arms affected by the advisory, and confines the advisory on the Metolius Arm to Perry South Cove. Water monitoring has confirmed that the level of blue-green algae toxins are below guideline values for human exposure. However, OHA recommends that people remain cautious when using the lake, particularly with pets because toxins are still well above the very low exposure levels established for dogs.
• A Permanent Health Advisory remains in effect for the South Umpqua River and Lawson Bar. Pools in the bedrock along the rivers edge are known to develop Blue-green Algae (cyanobacterial) blooms that can be harmful to pets and people if accidental ingestion occurs. Signs have been posted along several access areas along the river.

 

________________

 

Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:

• Sunny and still Hot but cooler with smokey haze this afternoon, mostly clear tonight,
• Mostly sunny and still hot but a bit cooler Saturday, partly cloudy Saturday night,
• Mostly sunny and a bit warmer, Hot again, Sunday, then mostly clear at night.
• highs 95-90 warming back to 95 Sunday lows 54-58.
• Mostly sunny and a bit cooler Monday, partly cloudy Monday night,
• Partly cloudy Tuesday through Wednesday AM,  mostly sunny in the afternoon, mostly clear Wednesday night,
• Then mostly sunny and a bit cooler Thursday.
• highs 92-90 lows 59-57. (seasonal averages high 84 low 52)

________________

Eugene-Springfield Pollen Count
Grass………. Low (3)
Trees………. Low (3)
Last Counted: 8/2/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

 

________________

 

Forecast for Roseburg:

• Sunny and a bit cooler but still hot with patchy smoke this afternoon, mostly clear with patchy smoke tonight,
• Sunny and a bit cooler, still hot, Saturday, partly cloudy in the evening, mostly clear Saturday night,
• Sunny and a bit cooler Sunday, then partly cloudy at night.
• highs 99-95 lows 58-62.
• Partly cloudy with a slight (20%) chance of thunderstorms Monday through Tuesday night,
• Partly cloudy Wednesday AM, sunny and a bit warmer in the afternoon, mostly clear at night,
• Then mostly sunny Thursday.
• highs 95-93 lows near 62. (seasonal averages high 86 low 57)

_____________________

Forecast for The South Central Oregon Coast Including Coos Bay and North Bend:

• Partly cloudy at the shore while sunny with patchy smoke inland and a bit cooler this afternoon, partly cloudy with patchy inland smoke tonight,
• Mostly cloudy with patchy AM coastal fog Saturday, sunny afternoon, partly cloudy at night,
• Mostly cloudy in the AM, mostly sunny Sunday afternoon, then partly cloudy Sunday night.
• highs near 66 lows near 55.
• Partly cloudy Monday and at night,
• Partly cloudy Tuesday through Thursday morning, then sunny and a bit warmer Thursday afternoon.
• highs near 66 lows near 55. (seasonal averages high 65 low 53)

________________

Forecast for the Cascades in Lane County:

• Mostly sunny and a bit cooler but still Hot this afternoon with areas of smoke, mostly clear and cooler tonight,
• AM sun, partly cloudy and a bit cooler Saturday and at night,
• Mostly sunny in the AM, partly cloudy and a bit cooler Sunday afternoon and  Sunday night.
• free air freezing level above 12,000 ft. tonight through Sunday night.
• highs 86-84 lows 50-55.
• Partly cloudy and a bit cooler with a slight (20%) chance of showers and thunderstorms Monday afternoon and evening, mostly clear late Monday night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms and a bit cooler Tuesday afternoon and evening, just partly cloudy at night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms Wednesday afternoon and evening, partly cloudy at night,
• Then partly cloudy Thursday with a slight (20%) chance of afternoon showers and thunderstorms.
• Free air freezing level above 12,000 ft. Monday through Wednesday, snow level above 8,000 ft. Wednesday night, then free air freezing level above 12,000 ft. Thursday.
• highs 80-78 lows 56-53.

 

________________

**Because weather forecasting is a combination of science, intuition, and timing there can be no absolute guarantees that individual forecasts will be 100% accurate. Nature is in a constant state of flux and sudden unexpected weather events can happen.

________________

Get your local Eugene-Springfield and Lane County news on-line at eugenedailynews.com.

________________