Here is my weekly weather quiz question. What is the “Bergeron Process?” 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 Low Pressure Trough (Shaded “U” shape with blue arrows will slide over and past us tonight while an Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) follows behind it and will take over for some warming. The graphics for days 3-7 show a frontal system approaching the Pacific Northwest next Friday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 30 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 28 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 28 in the Good 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 FROM 7 PM THIS EVENING UNTIL 11 AM SATURDAY FOR GUSTY EAST WIND WITH POOR RELATIVE HUMIDITY RECOVERY FOR THE SOUTHERN OREGON COAST, THE WESTERN ROGUE RIVER, AND THE SISKIYOU NATIONAL FOREST.
• A FIRE WEATHER WATCH IS IN EFFECT FOR GUSTY NORTHEAST WINDS AND LOW HUMIDITY FROM FRIDAY EVENING INTO SATURDAY MORNING FOR THE SOUTHERN OREGON COAST, THE WESTERN ROGUE RIVER, AND THE SISKIYOU NATIONAL FOREST.
• AN AIR QUALITY ALERT IS IN EFFECT UNTIL NOON TUESDAY FOR DESCHUTES COUNTY.
• AN AIR QUALITY ALERT IS IN EFFECT UNTIL 5 PM TODAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, THE CURRY COUNTY COAST, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, EASTERN KLAMATH COUNTY, WESTERN LAKE 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.
• 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

Saturday 8/26: Beavers vs Colorado State, at Sonny Lubick Field at Hughes Stadium, Fort Collins Colorado – Kickoff: 11:30 AM PDT- Mostly sunny 75  warming to 85-90 by games end.

Saturday 9/2: Ducks vs Southern Utah, at Autzen Stadium – Kickoff: 5:15 PM PDT – Too early for an a accurate weather forecast.

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

• Sunny and a bit warmer today, clear with patchy smoke tonight,
• Sunny and a bit warmer with patchy smoke Saturday and Sunday (hot), clear with patchy smoke at night.
• highs 82-94 lows 52-56.
• Sunny and a bit cooler with patchy smoke Monday, clear with patchy smoke at night,
• AM patchy smoke, sunny and a bit cooler Tuesday afternoon, clear Tuesday night,
• Sunny and a bit cooler Wednesday, clear at night,
• Then sunny and a bit warmer Thursday.
• highs 92-85 warming to 87 Thursday lows 56-54. (seasonal averages high 82 low 50)

 

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Forecast for Roseburg:

• Sunny and a bit warmer today, Saturday, and Sunday, clear each night.
• highs 85-98 lows 55-62.
• Sunny and a bit cooler Monday, Tuesday, and Wednesday, clear Monday night, mostly clear Tuesday night and Wednesday night,
• Then sunny and a bit warmer Thursday.
• highs 98-89 warming to 92 Thursday lows 62-59. (seasonal averages high 84 low 55)

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

• Sunny and a bit cooler this afternoon, clear tonight,
• Sunny and a bit warmer Saturday and Sunday, clear Saturday night, mostly clear Sunday night.
• highs 63-70 lows 50-55.
• Mostly sunny and a bit cooler Monday and Tuesday, mostly clear both nights,
• Mostly sunny and a bit cooler Wednesday and Thursday, mostly clear Wednesday night.
• highs 69-66 lows near 55. (seasonal averages high 66 low 53)

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Forecast for the Cascades in Lane County:

• Sunny and a bit warmer with patchy smoke today, clear with patchy smoke tonight and Saturday AM, sunny and a bit warmer with areas of smoke Saturday afternoon, clear with areas of smoke Saturday night,
• Sunny with areas of smoke and a bit warmer Sunday, clear with areas of smoke at night.
• free air freezing level above 12,000 ft. today and tonight, 15,000 ft. rising to 16,000 ft. Sunday, then 16,000 ft. Sunday night.
• highs 73-82 lows 52-55.
• Sunny with areas of smoke and a bit cooler Monday, clear with areas of smoke Monday night,
• Sunny and a bit cooler Tuesday, Wednesday, and Thursday, clear with areas of smoke each night,
• free air freezing level 15,000 ft. rising to 16,000 ft. Monday, 16,000 ft. Monday night and Tuesday, 16,000 ft. falling to 15,000 ft. Tuesday night, then 15,000 ft. Wednesday through Thursday.
• highs 83-75 warming to 87 Thursday lows 55-49.

 

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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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