Here is my weekly weather quiz question for the last time. What is a “Bubble High?” Here is the correct answer. A Bubble High is a mesoscale area of high pressure, typically associated with cooler air from the rainy downdraft area of a thunderstorm or a complex of thunderstorms. A gust front or outflow boundary separates a bubble high from the surrounding air.  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.

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An Upper Level Low Pressure Trough (Shaded “U” shape with blue arrows) is taking over sending us colder air and more fronts. The graphics for days 1-3 show the frontal system moving through today. The graphics for days 3-7 show a complex frontal system moving in south of us through California Monday and another front moving down from the northwest Thursday that should move through the Pacific Northwest next Friday if it doesn’t fall apart.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 26 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 10 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 14 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:

Today:

Ducks vs California, at Autzen Stadium – Kickoff: 7:30 PM PDT – Partly cloudy 62 with a slight (20%) chance of isolated showers, cooling as the game progresses, Wind: WSW 5-10 mph.

Beavers vs Washington, at Reser Stadium – Kickoff: 5:00 PM PDT – Partly cloudy 65 with a slight (20%) chance of isolated showers, cooling as the game progresses, Wind: WSW 5-10 mph.

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

• Mostly cloudy with a good (50%) chance of isolated AM showers, a bit cooler with a good (50%) chance of scattered showers this afternoon (under 0.10 in. of rain possible), partly cloudy with a slight (20%) chance of isolated showers this evening, mostly cloudy with a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible),
• Cloudy with a good (50%) chance of AM showers, mostly cloudy with showers likely (70%) and a slight (20%) chance of thunderstorms and a bit cooler Sunday afternoon (under 0.10 in. of rain possible), partly cloudy with a (40%) chance of evening showers and a slight (20%) chance of thunderstorms, mostly cloudy with a good (50%) chance of showers late Sunday night (under 0.10 in. of rain possible),
• A (40%) chance of AM showers, a mix of clouds and sun and a bit warmer with a good (50%) chance of showers Monday afternoon, partly cloudy with a slight (20%) chance of evening showers, then just partly cloudy late Monday night.
• highs 65-63 warming back to 65 Monday lows 46-39.
• Partly cloudy and a bit warmer Tuesday through Wednesday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday afternoon, partly cloudy with a slight (20%) chance of evening showers, a (30%) chance of showers late at night,
• Then a mix of clouds and sun and a bit cooler with a (40%) chance of showers Friday.
• highs 70-68 lows 40-45. (seasonal averages high 72 low 44)

 

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Forecast for Roseburg:

• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy this afternoon (under 0.10 in. of rain possible), partly cloudy this evening showers, mostly cloudy late tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with a (30%) chance of showers Sunday (under 0.10 in. of rain possible) and Sunday night (under 0.10 in. of rain possible),
• Mostly cloudy with a (30%) chance of showers Monday AM, partly cloudy and a bit cooler in the afternoon, a slight (20%) chance of evening showers, then just partly cloudy at night.
• highs 67-64 lows 47-42.
• Partly cloudy and a bit warmer Tuesday through Wednesday night,
• Partly cloudy Thursday AM, mostly cloudy with a slight (20%) chance of showers in the afternoon, then mostly cloudy with a slight (20%) chance of showers Thursday night and Friday.
• highs 6near 70 lows 42-46. (seasonal averages high 74 low 48)

 

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

• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler with a slight (20%) chance of showers this afternoon (under 0.10 in. of rain possible), just partly cloudy this evening, mostly cloudy with a slight (20%) chance of coastal showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy and a bit cooler with a (30%) chance of showers Sunday (under 0.10 in. of rain possible), partly cloudy in the evening and mostly cloudy at night with a (30%) chance of coastal showers while a slight (20%) chance of inland showers Sunday night.
• highs 64-62 lows 49-46.
• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler with a (40%) chance of showers Monday afternoon, partly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Monday night,
• Partly cloudy Tuesday through Wednesday night,
• Mostly cloudy with a slight (20%) chance of showers Thursday and at night,
• Then mostly cloudy with a (30%) chance of showers Friday.
• highs 65-63 lows 47-50. (seasonal averages high 63 low 48)

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Forecast for the Cascades in Lane County:

• Partly cloudy with a (40%) chance of isolated AM showers, a bit cooler with a (40%) chance of scattered showers this afternoon (under 0.10 in. of rain possible), mostly cloudy with a good (50%) chance of scattered evening showers, a (40%) chance of scattered rain and snow showers late tonight,
• Mostly cloudy with a good (50%) chance of AM rain and snow showers, a bit cooler with rain and snow showers likely (70%) Sunday afternoon, a good (50%) chance of rain and snow showers late Sunday night,
• Then partly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Monday and at night.
• snow level 6,500 ft. today, 5,500 ft. tonight and Sunday, 4,500 ft. Monday, then 5,500 ft. Monday night.
• highs 47-43 warming to 45 Monday night lows 34-29.
• Partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday and in the evening, just partly cloudy and a bit warmer at night through Wednesday night,
• A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday afternoon, partly cloudy with a slight (20%) chance of evening showers, a (30%) chance of showers late at night,
• Then a mix of clouds and sun and a bit warmer with a (40%) chance of showers Friday.
• snow level 6,000 ft. Tuesday, 6,500 ft. Tuesday night, free air freezing level 8,000 ft. rising to 9,000 ft. Wednesday, 9,000 ft. Wednesday night and Thursday AM, then snow level above 8,000 ft. Thursday afternoon through Friday.
• highs 45-55 lows 33-37.

 

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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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