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) has taken over sending us colder air and more fronts. The graphics for days 1-3 show the frontal system that moved through. The graphics for days 3-7 show a cold front moving out of the northwest at us next Saturday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 25 in the Good category measuring Ozone.

Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 31 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:

October 7th:

Ducks vs Washington State, at Autzen Stadium – Kickoff: To Be Announced.

Beavers vs USC, at Los Angeles Coliseum – Kickoff: 1:00 PM PDT – Too early for a preliminary weather forecast.

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

• Partly cloudy with a slight (20%) chance of isolated showers this evening, mostly cloudy with a good (50%) chance of showers late tonight (under 0.10 in. of rain possible),
• Mostly cloudy with a good (50%) chance of showers and a bit warmer Sunday with a slight (20%) chance of thunderstorms in the afternoon (0.10 in. of rain possible, more in storms), partly cloudy with a slight (20%) chance of evening showers thunderstorms, mostly cloudy with a slight (20%) chance of showers late Sunday night (under 0.10 in. of rain possible),
• Partly cloudy with a slight (20%) chance of showers Monday (under 0.10 in. of rain possible), mostly clear at night,
• Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night.
• lows 48-39 highs 64-70.
• Partly cloudy Wednesday through Thursday night,
• Partly cloudy with a slight (20%) chance of showers Friday afternoon and at night,
• Then partly cloudy and a bit cooler Saturday.
• highs 72-68 lows 40-45. (seasonal averages high 71 low 44)

 

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Forecast for Roseburg:

• Partly cloudy this evening with a slight (20%) chance of 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), a slight (20%) chance of showers at night (under 0.10 in. of rain possible),
• Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler with a slight (20%) chance of showers Monday afternoon (under 0.10 in. of rain possible), partly cloudy evening, mostly cloudy late Monday night,
• Mostly sunny and a bit warmer Tuesday, mostly clear at night.
• lows 48-42 highs 66-72.
• Mostly sunny and a bit warmer Wednesday, mostly clear Wednesday night,
• Partly cloudy Thursday and at night,
• Then partly cloudy and a bit cooler Friday through Saturday.
• highs 73-70 lows 45-47. (seasonal averages high 73 low 48)

 

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

• Partly cloudy with a slight (20%) chance of coastal showers 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 with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late Sunday night and Monday AM showers, partly cloudy and a bit cooler with a slight (20%) chance of showers Monday afternoon (under 0.10 in. of rain possible), becoming mostly clear Monday night,
• Mostly sunny and a bit warmer Tuesday, mostly clear at night.
• lows 52-47 highs 63-66.
• Mostly sunny Wednesday, mostly clear Wednesday night,
• Then partly cloudy and a bit cooler Thursday through Saturday.
• highs 66-64 lows 48-50. (seasonal averages high 63 low 48)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with a good (50%) chance of scattered showers tonight (0.10 in. of rain possible),
• Mostly cloudy with rain and snow showers and a bit cooler Sunday (0.10 in. of rain possible, 1 in. of snow possible), partly cloudy with a good (50%) chance of rain and snow showers Sunday night,
• Partly cloudy and a bit warmer with a slight (20%) chance of rain and snow showers Monday, just partly cloudy at night,
• Mostly sunny and a bit warmer Tuesday, mostly clear at night.
• snow level 6,000 ft. tonight, 5,500 ft. Sunday, 5,000 ft. Sunday night, 4,500 ft. Monday, free air freezing level 7,000 ft. Monday night, 7,000 ft. rising to 9,000 ft. Tuesday, then 9,000 ft. Tuesday night.
• lows 35-29 warming to 32 Tuesday night highs 42-50.
• Mostly sunny and a bit warmer Wednesday, partly cloudy and a bit warmer Wednesday night through Thursday night,
• Partly cloudy with a slight (20%) chance of showers Friday and in the evening, then just partly cloudy Friday night and Saturday (a bit cooler).
• snow level free air freezing level 9,000 ft. Wednesday, 9,000 ft. rising to 10,000 ft. Wednesday night, 10,000 ft. rising to 11,000 ft. Thursday afternoon, 11,000 ft. rising to 12,000 ft. Thursday night and Friday AM, snow level above 8,000 ft. Friday afternoon and evening, free air freezing level 14,000 ft. late Friday night and Saturday.
• highs 55-50 lows 34-36.

 

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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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