Here is my weekly weather quiz question. What is the “Beaufort Scale?” 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) will linger offshore as low pressure is well east of us. Those two elements will keep our weather stable for a while, then the ridge will start to heat us up again next week. The graphics for days 1-3 show a frontal system pushing through the Pacific Northwest over night into Saturday. The graphics for days 3-7 show a frontal system moving through between Thursday and Friday next week.

________________

Air Quality Index:

Eugene-Springfield: The Air Quality Index is 31 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 57 in the Moderate category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 35 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

__________________

Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR LOW RELATIVE HUMIDITY AND BREEZY WINDS UNTIL 10 PM TONIGHT FOR THE EAST SLOPES OF THE CENTRAL OREGON CASCADES, THE DDSCHUTES NATIONAL FOREST, THE MINUS SISTERS RANGER DISTRICT, THE EAST SLOPES OF THE NORTHERN CASCADES, THE CENTRAL MOUNTAINS OF OREGON, AND THE LOWER COLUMBIA BASIN OF OREGON.
• AN AIR QUALITY ALERT IS IN EFFECT UNTIL 11 PM SUNDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, THE CURRY COUNTY COAST, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE KLAMATH BASIN.
• The Oregon Health Authority issued a Health Advisory 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:

• Clear tonight,
• Mostly sunny and a bit cooler Saturday, clear at night,
• Mostly sunny and a bit warmer Sunday and Monday, clear each night.
• lows 56-50 warming back to 56 Monday night highs 82-87.
• Mostly sunny Tuesday, partly cloudy at night,
• AM sun, partly cloudy and a bit cooler Wednesday and in the evening, mostly cloudy late Wednesday night,
• A mix of clouds and sun and a bit cooler Thursday, partly cloudy at night,
• Then mostly sunny and a bit warmer Friday.
• highs 87-79 warming to 82 Friday lows 56-52. (seasonal averages high 83 low 51)

 

________________

Eugene-Springfield Pollen Count

Grass………. Low (2)
Trees………. Low (6)
Last Counted: 8/12/17
Data Courtesy of Oregon Allergy Associates.
Note: It would seem the pollen season is over.

________________

Forecast for Roseburg:

• Mostly clear with patchy smoke this evening, areas of smoke late tonight,
• AM clouds, mostly sunny with areas of smoke and a bit cooler Saturday, clear with patchy evening smoke, areas of smoke late Saturday night,
• Areas of AM smoke, sunny with patchy smoke Sunday afternoon, mostly clear with patchy evening smoke, areas of smoke late at night,
• Areas of AM smoke, sunny and a bit warmer with patchy smoke Monday afternoon, then mostly clear with patchy smoke Monday night.
• lows 58-54 warming to 60 Monday night highs 86-93.
• Mostly sunny with patchy smoke Tuesday, partly cloudy with patchy evening smoke, just partly cloudy late Tuesday night,
• Partly cloudy and a bit cooler Wednesday and at night,
• Mostly cloudy with a slight (20%) chance of showers Thursday AM, partly cloudy and a bit cooler Thursday afternoon and evening, mostly clear late at night,
• Then sunny Friday.
• highs 93-84 lows near 60. (seasonal averages high 84 low 55)

_____________________

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

• Partly cloudy this evening, mostly cloudy late tonight and Saturday AM, sunny and a bit cooler Saturday afternoon, mostly clear in the evening, partly cloudy late Saturday night and Sunday AM, sunny and a bit warmer in the afternoon, clear in the evening, partly cloudy late Sunday night,
• Then partly cloudy Monday and at night.
• lows near 55 highs 69-65 warming to 67 Sunday.
• Partly cloudy Tuesday through Wednesday evening, mostly cloudy with a slight (20%) chance of showers Wednesday night and Thursday AM, partly cloudy and a bit cooler Thursday afternoon and evening, mostly clear late Thursday night,
• Then sunny and a bit warmer Friday.
• highs 67-64 lows near 55. (seasonal averages high 66 low 53)

________________

Forecast for the Cascades in Lane County:

• Clear with patchy smoke tonight,
• Sunny and a bit cooler with patchy smoke Saturday, clear with patchy smoke Saturday night,
• Mostly sunny and a bit warmer with patchy smoke Sunday, mostly clear Sunday night with patchy smoke,
• Mostly sunny and a bit warmer with patchy smoke Monday, mostly clear with patchy smoke at night.
• free air freezing level above 12,000 ft. tonight through Monday night
• lows 48-46 warming to 49 Monday night highs 70-79.
• Mostly sunny with patchy AM smoke, partly cloudy and a bit cooler Tuesday afternoon and at night,
• Partly cloudy with a slight (20%) chance of showers and thunderstorms and a bit cooler Wednesday afternoon and evening, mostly cloudy with a slight (20%) chance of showers Wednesday night,
• A slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler Thursday afternoon, partly cloudy at night,
• Then mostly sunny and a bit warmer Friday.
• free air freezing level above 12,000 ft. Tuesday through Wednesday AM, snow level above 8,000 ft. Wednesday afternoon through Thursday AM, free air freezing level above 12,000 ft. late Wednesday night, above 12,000 ft. falling to 12,000 ft. Thursday afternoon, then free air freezing level above 12,000 ft. Thursday night and Friday.
• highs 79-70 lows 53-49.

 

________________

**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.

________________