Here is my weekly weather quiz question. What is a “Capping Inversion?”  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) took over bringing sunshine and slightly warmer temperatures. An Upper Level Low Pressure Trough takes over today enhancing the rain chances again. The graphics for days 1-3 show the frontal system that approaches the Pacific Northwest today and at least the southern end of it will brush by the area. The graphics for days 3-7 show complex frontal systems approaching Wednesday and Friday through Monday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 40 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 34 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 42 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

 

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Advisories:

• A Health Advisory remains in effect for the Link and Klamath from Keno Dam to J.C. Boyle Dam (downstream from Keno Dam). Water monitoring has confirmed the presence of blue-green algae and the toxins they produce. 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.
• 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 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 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 October 21st:

Ducks vs UCLA, at the Rose Bowl, Pasadena, California – Kickoff: 1 PM PDT – Preliminary weather forecast- Sunny 78, warming to 82 then cooling by the end of the game, Wind S 5 mph.

Beavers have a bye week

Next game scheduled:

Thursday October 26th:

Beavers vs Stanford, at Reser Stadium – Kickoff: 6:00 PM PDT –Way too soon for a preliminary weather forecast.

 

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

• Patchy AM fog, mostly cloudy and a bit cooler with with a good (50%) chance of rain this afternoon (under 0.10 in. of rain possible), mostly cloudy with patchy fog late tonight,
• Mostly cloudy with a slight (20%) chance of AM rain and a bit warmer Wednesday, a good (50%) chance of rain late at night,
• Mostly cloudy and breezy with rain and a bit cooler Thursday, showers Thursday night.
• highs 62-67 cooling to 56 Thursday lows 48-45.
• Mostly cloudy and a bit cooler with showers likely (70%) Friday, cloudy with a good (50%) chance of showers at night,
• Cloudy with rain likely (70%) and a bit warmer Saturday, rain Saturday night,
• Cloudy and a bit warmer with a (40%) chance of rain Sunday, mostly cloudy with a slight (20%) chance of rain at night,
• Then a mix of clouds and sun and a bit warmer Monday.
• highs 52-65 lows 45-50. (seasonal averages high 64 low 41)

 

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Forecast for Roseburg:

• Sunny and a bit cooler this afternoon, partly cloudy with a slight (20%) chance of evening rain, mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of rain and a bit warmer Wednesday afternoon and again late at night,
• Cloudy with a good (50%) chance of AM rain, then rain and a bit cooler Thursday afternoon and Thursday night.
• highs 69-72 cooling to 60 Thursday lows 48-45.
• Cloudy with showers and a bit cooler Friday, mostly cloudy with a (30%) chance of showers Friday night,
• Cloudy with rain likely (70%) and a bit warmer Saturday, mostly cloudy and a bit warmer with a (30%) chance of rain at night and Sunday, partly cloudy and colder with a slight (20%) chance of showers Sunday night,
• Then just partly cloudy and a bit warmer Monday.
• highs 58-68 lows 45-52 cooling to 44 Sunday night. (seasonal averages high 66 low 44)

 

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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 and a bit warmer this afternoon, a slight (20%) chance of evening rain, just mostly cloudy late tonight,
• Mostly cloudy with a slight (20%) chance of rain and a bit warmer Wednesday afternoon, a (30%) chance of coastal rain Wednesday night while a slight (20%) chance of inland rain late at night,
• Mostly cloudy and breezy with rain and a bit cooler Thursday, showers and a slight (20%) chance of thunderstorms Thursday night.
• highs 62-64 cooling 59 Thursday lows 53-49.
• Cloudy with showers and a bit cooler Friday, mostly cloudy with a (30%) chance of showers at night,
• Cloudy with rain likely (70%) Saturday and breezy, mostly cloudy with a good (50%) chance of rain and breezy Saturday night,
• Mostly cloudy with a (30%) chance of rain and a bit warmer Sunday, a slight (20%) chance of showers at night,
• Then just partly cloudy and a bit warmer Monday.
• highs 59-64 lows 50-55 cooling back to 50 Sunday night. (seasonal averages high 61 Low 46)

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Forecast for the Cascades in Lane County:

• Partly cloudy and a bit cooler a slight (20%) chance of rain late this afternoon, mostly cloudy with a slight (20%) chance of evening showers (under 0.10 in. of rain possible), just mostly cloudy late  tonight,
• A mix of clouds and sun and a bit warmer Wednesday, just partly cloudy at night,
• Cloudy and a bit cooler with rain and breezy Thursday, evening rain, then rain and snow showers late Thursday night.
• snow level above 8,000 ft. this afternoon and tonight, free air freezing level 11,000 ft. Wednesday and Wednesday night, 8,000 ft. Thursday, then 5,000 ft. Thursday night,
• highs 56-58 cooling to 50 Thursday lows 40-33.
• Cloudy with rain and snow showers and a bit cooler Friday, mostly cloudy with a (40%) chance of rain and snow showers Friday night,
• Cloudy and a bit warmer with rain Saturday, a good (50%) chance of rain Saturday night,
• A bit warmer with a (40%) chance of rain Sunday, mostly cloudy with a (30%) chance of showers at night,
• Then just partly cloudy and a bit warmer Monday.
• snow level 4,000 ft. Friday and Friday night, 5,500 ft. Saturday, above 8,000 ft. Saturday night through Sunday night, then free air freezing level 13,000 ft. Monday.
• highs 34-54 lows 32-38.

 

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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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