Here is my weekly weather quiz question. What is a “Bubble 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 returning summer-like weather for a short time at least. The graphics for days 1-3 show the next frontal system moving in Friday morning. The graphics for days 3-7 show a complex frontal system moving in next Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 32 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 20 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 34 in the Good category measuring Ozone.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

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Advisories:

• A Health Advisory has been Reissued for the Link and Klamath rivers to Keno Dam. An error caused the advisory to be cancelled. 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.
• 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 including Shoalwater Bay to the north and now 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.
• 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:

Ducks vs California, at Autzen Stadium – Kickoff: 7:30 PM PDT – Mostly cloudy 64 with a good (50%) chance of showers, cooling as the game progresses.

Beavers vs Washington, at Reser Stadium – Kickoff: 5:00 PM PDT – Mostly cloudy 67 with a good (50%) chance of showers, cooling as the game progresses,.

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

• Clear tonight,
• Mostly sunny and warm Thursday, clear in the evening, partly cloudy late Thursday night,
• Mostly cloudy and much cooler with a good (50%) chance rain Friday and in the evening, a good (50%) chance of showers late at night,
• Mostly cloudy with AM showers likely (70%), a bit cooler with a good (50%) chance of showers Saturday afternoon and evening, partly cloudy with a good (50%) chance of showers Saturday night.
• lows 54-47 highs 85-66.
• A mix of clouds and sun with a good (40%) chance of showers Sunday, mostly cloudy with a good (50%) chance of showers Sunday night and Monday, a (40%) chance of showers Monday night,
• Then mostly cloudy with a (40%) chance of showers Tuesday through Wednesday.
• highs 66-63 lows near 47. (seasonal averages high 73 low 45)

 

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Forecast for Roseburg:

• Clear tonight,
• Sunny and a bit cooler Thursday, mostly clear in the evening, partly cloudy Thursday night,
• Mostly cloudy with a (40%) chance of AM rain, rain likely (70%) and much cooler Friday afternoon, mostly cloudy with good (50%) chance of evening rain, a good (50%) chance of showers late at night,
• Mostly cloudy with a (40%) chance of showers Saturday and Saturday night.
• lows 56-48 highs 88-70.
• Mostly cloudy with a (40%) chance of showers Sunday and Sunday night,
• Mostly cloudy with a (30%) chance of showers and a bit cooler Monday through Tuesday night, then mostly cloudy with a slight (20%) chance of showers Wednesday.
• highs 69-64 lows 50-47. (seasonal averages high 75 low 49)

 

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

• Mostly clear tonight,
• Partly cloudy in the AM, sunny and a bit cooler Thursday afternoon, partly cloudy in the evening, mostly cloudy with patchy coastal fog late Thursday night,
• Cloudy with a (40%) chance of AM rain, rain likely (70%) and a bit cooler Friday afternoon, mostly cloudy with a (40%) chance of evening showers, a slight (20%) chance of showers late at night,
• Mostly cloudy and a bit warmer with a good (50%) chance of showers Saturday, then a slight (20%) chance of showers at night.
• lows 55-52 highs 67-62 warming to 64 Saturday.
• Mostly cloudy and a bit cooler with a good (50%) chance of showers Sunday through Tuesday,  then mostly cloudy with a (40%) chance of showers Monday night and Wednesday.
• highs 63-60 warming to 63 Wednesday lows 52-50. (seasonal averages high 64 low 48)

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Forecast for the Cascades in Lane County:

• Clear tonight,
• Sunny and a bit warmer Thursday, clear in the evening, partly cloudy late Thursday night,
• A mix of clouds and sun with a slight (20%) chance of AM rain, a bit cooler with rain likely (70%) Friday afternoon and evening, a good (50%) chance of showers and cooler late Friday night,
• A mix of clouds and sun with a good (50%) chance of showers and a bit cooler Saturday, mostly cloudy with a good (50%) chance of evening showers, then a good (50%) chance of rain and snow showers late at night.
• free air freezing level 14,000 ft. tonight, 14,000 ft. falling to 13,000 ft. Thursday afternoon, 13,000 ft. falling to 12,000 ft. late Thursday night, snow level above 8,000 ft. Friday afternoon, 8,000 ft. falling to 7,000 ft. late Friday night, 6,000 ft. Saturday, then 5,500 ft. Saturday night.
• lows 46-37 highs 72-48.
• A mix of clouds and sun with a (40%) chance of AM rain and snow showers, a bit warmer with a (40%) chance of showers Sunday afternoon, mostly cloudy with a (40%) chance of showers Sunday night through Tuesday evening, partly cloudy with a slight (20%) chance of showers late at night,
• A mix of clouds and sun with a slight (20%) chance of AM showers, then a (40%) chance of showers and a bit warmer Wednesday afternoon.
• snow level 5,500 ft. Sunday, 6,000 ft. Sunday night, 6,500 ft. Monday, 7,000 ft. Monday night, 7,500 ft. Tuesday, then 6,500 ft. Tuesday night and Wednesday.
• highs 50-47 warming to 50 Wednesday lows 37-34.

 

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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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