Here is my weekly weather quiz question. What is a “Cap Cloud?” 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 moving in for a change of weather. Tonight, however, will be clear and dropping into the 30s again. The overnight low of 32 tied the record low set in 2012. An Upper Level High Pressure Ridge (Shaded “Arch” shape with blue arrows) will replace the Low Pressure Trough to bring back the sunshine and warming temperatures neat week. The graphics for days 1-3 show the weak frontal system moving in for Saturday. The graphics for days 3-7 show a complex frontal system moving into the Pacific Northwest next Thursday.

Note: The computer models keep changing the chance of precipitation for Saturday’s Ducks home game. Earlier in the week the chance was slight. It upgraded to a 50% chance by Wednesday, and now it’s at 50% for the afternoon and has dropped down to a 40% chance of showers for the evening and at night. If you are going to the game it might be a good idea to be prepared for a little shower. Better safe than sorry.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 28 in the Good category measuring Particulate Matter.

Oakridge: The Air Quality Index is 22 in the Good category measuring Particulate Matter.

Cottage Grove: The Air Quality Index is 10 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 rivers to Keno Dam. 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.
• 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:

October 7th:

Ducks vs Washington State, at Autzen Stadium – Kickoff: 5:00 PM PDT – Partly cloudy 66, dropping to a 40% chance of showers, cooling as the game progresses, Wind: W 5-10 mph.

Beavers vs USC, at Los Angeles Coliseum – Kickoff: 1:00 PM PDT – Sunny 84, warming to near 90 by the end of the game, wind: SW 5 mph.

 

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

• Clear tonight,
• Patchy AM fog, mostly sunny and a bit warmer Friday, partly cloudy with a slight (20%) chance of evening rain, a good (50%) chance of showers late at night,
• A mix of clouds and sun and a bit cooler with a good (50%) of chance of showers Saturday (under 0.10 in. of rain possible), partly cloudy with a (40%) chance of showers Saturday night and Sunday AM, a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers in the afternoon, then becoming mostly clear Sunday night,
• lows 37-46 cooling to 39 Sunday night highs 74-64.
• Mostly sunny and a bit warmer Monday (Columbus Day), partly cloudy Monday  night,
• Partly cloudy Tuesday through Wednesday (a bit cooler), partly cloudy with a slight (20%) chance of showers Wednesday night,
• Then mostly sunny and a bit cooler with a (30%) chance of showers Thursday.
• highs 70-72 cooling to 66 Thursday lows 40-42. (seasonal averages high 69 low 43)

 

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Forecast for Roseburg:

• Clear tonight,
• Sunny Friday, mostly clear in the evening, partly cloudy late Friday night,
• Partly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler Saturday afternoon, clear in the evening, partly cloudy late at night,
• AM clouds, partly cloudy and a bit cooler Sunday afternoon, then mostly clear Sunday night.
• lows 44-48 cooling to 42 Sunday night highs 75-66.
• Sunny and a bit warmer Monday (Columbus Day), mostly clear at night,
• Mostly sunny and a bit cooler Tuesday and Wednesday, mostly clear both nights.
• Then mostly sunny and a bit cooler with a slight (20%) chance of rain Thursday.
• highs 73-69 lows 43-45. (seasonal averages high 73 low 48)

 

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

• Clear with patchy coastal fog tonight and Friday AM, sunny and a bit cooler in the afternoon, mostly clear in the evening, partly cloudy late at night,
• Partly cloudy with a slight (20%) chance of AM coastal showers, mostly cloudy and a bit cooler Saturday afternoon, just partly cloudy Saturday night,
• AM clouds, partly cloudy and a bit cooler Sunday afternoon, then mostly clear at night.
• lows 48-52 cooling to 45 Sunday night highs 65-63.
• Mostly sunny and a bit warmer Monday (Columbus Day), mostly clear Monday night,
• Mostly sunny and a bit cooler Tuesday, mostly clear at night,
• Then mostly sunny and a bit cooler Wednesday and Thursday, mostly clear Wednesday night.
• highs 69-63 lows 44-46. (seasonal averages high 63 low 48)

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Forecast for the Cascades in Lane County:

• Clear tonight,
• Mostly sunny and a bit warmer Friday, mostly clear with a slight (20%) chance of rain late Friday night,
• Cloudy with a good (50%) chance of AM showers, a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Saturday afternoon, partly cloudy with a good (50%) chance of evening showers, mostly cloudy with a good (50%) chance of showers late at night,
• A mix of clouds and sun with a good (50%) chance of rain and snow showers Sunday, then becoming partly cloudy Sunday night.
• free air freezing level 12,000 ft. rising to 13,000 ft. late tonight, 13,000 ft. rising to 14,000 ft. Friday afternoon, snow level above 8,000 ft. Friday night and Saturday, 8,000 ft. Saturday night, 5,500 ft. Sunday, then free air freezing level 11,000 ft. Sunday night.
• lows 36-30 highs 62-47.
• Mostly sunny and a bit warmer Monday (Columbus Day) and Tuesday, partly cloudy at night through Wednesday, mostly clear Wednesday night,
• Then mostly sunny with a slight (20%) chance of rain Thursday.
• free air freezing level 13,000 ft. Monday, 14,000 ft. Monday night and Tuesday, 13,000 ft. Tuesday night and Wednesday, 12,000 ft. Wednesday night, then snow level above 8,000 ft. Thursday.
• highs 55-59 cooling to 52 Thursday lows 33-35.

 

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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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