Here is my weekly weather quiz question. What is “The Bermuda High?” 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.

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An Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) has taken over again producing  another warming trend and allowing wildfire smoke to infiltrate the area again. The graphics for days 3-7 show a frontal system waffling as it attempts to move through the Pacific Northwest and yet another front approaching the coast Next Friday.

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Air Quality Index:

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

Oakridge: The Air Quality Index is 234 in the Very Unhealthy category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 74 in the Moderate category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

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Advisories:

• A RED FLAG WARNING IS IN EFFECT FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY UNTIL 9 PM TONIGHT FOR THE ENTIRE WILLAMETTE VALLEY.
• A RED FLAG WARNING IS IN EFFECT FROM NOON SATURDAY UNTIL 9 PM MONDAY FOR HOT, DRY, AND UNSTABLE CONDITIONS FOR THE NORTH OREGON COAST RANGE, THE EAST SLOPES OF THE CENTRAL OREGON COAST RANGE, THE NORTH OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, THE MT. HOOD NATIONAL FOREST WEST  OF CASCADE CREST, AND THE WILLAMETTE NATIONAL FOREST.
• A RED FLAG WARNING IS IN EFFECT FOR VERY DRY AND UNSTABLE CONDITIONS FROM 1 PM UNTIL 8 PM SATURDAY FOR THE UMPQUA BASIN, THE UMPQUA NATIONAL FOREST, THE KLAMATH BASIN, THE FREMONT WINEMA NATIONAL FOREST,  THE CENTRAL MOUNTAINS OF OREGON,     THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THEN THE WESTERN KLAMATH NATIONAL FOREST.
• A RED FLAG WARNING IS IN EFFECT FROM UNTIL 8 PM TONIGHT FOR VERY DRY AND UNSTABLE CONDITIONS FOR THE UMPQUA BASIN, THE SOUTHERN OREGON COAST, THE WESTERN ROGUE RIVER, THE SISKIYOU NATIONAL FOREST, AND THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY.
• A FIRE WEATHER WATCH IS IN EFFECT FROM SATURDAY MORNING THROUGH MONDAY EVENING FOR VERY HOT, DRY, UNSTABLE CONDITIONS FOR THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL  COAST RANGE OF WESTERN OREGON,  THE NORTHERN OREGON CASCADE FOOTHILLS, THE CENTRAL OREGON CASCADE FOOTHILLS, MT. HOOD NATIONAL FOREST WEST OF CASCADE CREST,  AND THE WILLAMETTE NATIONAL FOREST.
• AN EXCESSIVE HEAT WARNING IS IN EFFECT THROUGH 11 PM MONDAY FOR THE SOUTH CENTRAL OREGON COAST, THE CURRY COUNTY COAST, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.
• A HEAT ADVISORY IS IN EFFECT FROM 2 PM SATURDAY UNTIL 10 PM TUESDAY THE COAST RANGE OF NORTHWEST OREGON, THE CENTRAL COAST RANGE OF WESTERN OREGON, THE LOWER COLUMBIA, THE GREATER PORTLAND METRO AREA, THE CENTRAL WILLAMETTE VALLEY, THE SOUTH WILLAMETTE VALLEY,THE NORTHERN OREGON CASCADE FOOTHILLS, THE CASCADE FOOTHILLS IN LANE COUNTY, THE UPPER HOOD RIVER VALLEY, THE WESTERN COLUMBIA RIVER GORGE, THE CENTRAL COLUMBIA RIVER GORGE, THE NORTHERN OREGON CASCADES AND THE CASCADES IN LANE COUNTY.
• AN AIR QUALITY ALERT IS IN EFFECT UNTIL 11 PM TUESDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, THE CURRY COUNTY COAST, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, NORTHERN KLAMATH COUNTY, EASTERN KLAMATH COUNTY, WESTERN LAKE COUNTY, THE SOUTH CENTRAL OREGON CASCADES, THE SOUTHERN OREGON CASCADES, THE SISKIYOU MOUNTAINS, AND THE KLAMATH BASIN.
• AN AIR QUALITY ALERT IS IN EFFECT UNTIL NOON TUESDAY FOR CROOK COUNTY, DESCHUTES COUNTY, AND JEFFERSON COUNTY.
• 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 now include Shoalwater Bay to the north and all of Upper Klamath Lake. 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.
• A Health Advisory remains in effect 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.
• A Health Advisory remains in effect 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.
• A Health Advisory remains in effect 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 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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Your College Football Forecast:

Ducks vs Southern Utah, at Autzen Stadium – Kickoff: 5:15 PM PDT – Sunny 98 with smoke and cooling as the sun sets and the game progresses, light wind.

Beavers vs Portland State, at Reser Stadium – Kickoff: 11:00 AM PDT- Sunny 75 with smoke and warming to near 95 by the end of the game, light wind.

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

• Clear with patchy smoke late tonight,
• Sunny and Hotter with more smoke Saturday, clear with smoke Saturday night,
• Mostly sunny and Very Hot with smoke Sunday, clear with smoke at night,
• AM sun, partly cloudy and Very Hot with smoke Monday (Labor Day), clear in the evening, partly cloudy with smoke late Monday night,
• lows 57-60 highs near 98.
• AM sun, partly cloudy and Hot, but a bit cooler with smoke Tuesday, partly cloudy with smoke Tuesday night,
• A mix of clouds and sun with more smoke and a bit cooler with a slight (20%) chance of showers and thunderstorms Wednesday afternoon, partly cloudy with a slight (20%) chance of showers and thunderstorms Wednesday night,
• A mix of clouds and sun with a slight (20%) chance of showers and thunderstorms Thursday AM, more smoke and a bit cooler with a slight (20%) chance of afternoon showers,  partly cloudy with smoke and a slight (20%) chance of showers Thursday night,
• Then a mix of clouds and sun and  a bit cooler with more smoke and a slight (20%) chance of showers Friday afternoon.
• highs 94-83 lows 60-57. (seasonal averages high 81 low 50)

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Forecast for Roseburg:

• Clear with patchy evening smoke, areas of smoke late tonight,
• Sunny and Hot with areas of smoke  Saturday, clear with areas of smoke at night,
• Sunny and Hot, but a bit cooler with areas of smoke Sunday, clear with patchy evening smoke, areas of smoke late Sunday night,
• Sunny and a bit cooler with patchy smoke Monday (Labor Day), partly cloudy with patchy smoke and and a slight (20%) chance of thunderstorms Monday night.
• lows 60-64 cooling back to 60 Monday night highs 104-96 .
• Partly cloudy and a bit warmer with patchy smoke and a slight (20%) chance of thunderstorms Tuesday afternoon Tuesday through Thursday (a bit cooler Wednesday and Thursday), partly cloudy with patchy smoke and a slight (20%) chance of showers and thunderstorms Thursday night and cooler Friday.
• highs 99-86 lows 63-65 cooling back to 63 Thursday night. (seasonal averages high 83 low 54)

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

• Clear with patchy smoke tonight,
• Sunny and a bit warmer with patchy coastal smoke Saturday while areas of inland AM smoke and patchy inland smoke in the afternoon, clear with patchy smoke at the shore at night while patchy evening inland smoke and areas of inland smoke late Saturday night,
• Patchy AM coastal smoke and sunny and a bit warmer Sunday afternoon while areas of inland AM smoke and sunny with patchy inland smoke in the afternoon, clear with patchy inland smoke at night,
• Mostly sunny Monday (Labor Day), then mostly clear Monday night.
• lows 54-56 highs near 73.
• Partly cloudy and a bit cooler Tuesday through Wednesday, partly cloudy with a slight (20%) chance of thunderstorms Wednesday night through Thursday night (a bit warmer Thursday),
• Then just partly cloudy and cooler Friday.
• highs 68-72 cooling to 66 Friday lows 56-58. (seasonal averages high 66 low 52)

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Forecast for the Cascades in Lane County:

• Clear with areas of evening smoke, clear with smoke late tonight,
• Sunny and Hot with smoke Saturday, clear with smoke at night,
• Mostly sunny and Hot, but a bit cooler with smoke Sunday afternoon, partly cloudy with smoke Sunday night,
• AM sun, partly cloudy and a bit warmer with more smoke Monday with a slight (20%) chance of thunderstorms in the afternoon and evening, partly cloudy with smoke late Monday night.
• free air freezing level above 12,000 ft. tonight through Monday night.
• lows 60-57 warming back to 60 Monday night highs 92-86 warming to 88 Monday.
• A mix of clouds and sun and a bit cooler with areas of smoke and a slight (20%) chance of showers Tuesday afternoon,  mostly cloudy with a slight (20%) chance of evening showers, mostly cloudy with smoke late at night,
• A mix of clouds and sun with smoke and a slight (20%) chance of showers and thunderstorms and a bit cooler Wednesday afternoon, mostly cloudy with a slight (20%) chance of showers and thunderstorms Wednesday night,
• Mostly cloudy with a slight (20%) chance of AM showers and thunderstorms, a slight (20%) chance of showers and thunderstorms and a bit cooler Thursday, mostly cloudy with smoke and a slight (20%) chance of showers at night,
• Then a mix of clouds and sun and a bit cooler with more smoke and a slight (20%) chance of showers Friday.
• free air freezing level above 12,000 ft. Tuesday through Friday.
• highs 86-74 lows 56-52.

 

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**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.

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

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