Here is my weekly weather quiz question. What are “Capillary Waves?” 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) returned shower chances that will continue through Friday. The graphics for days 1-3 show no frontal systems in the area, but rain caused by the upper low. The graphics for days 3-7 show complex frontal systems approaching Tuesday and another frontal system taking shape next Tuesday through Thursday.

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Air Quality Index:

Eugene-Springfield: The Air Quality Index is 9 in the Good category measuring Particulate Matter.

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

Cottage Grove: The Air Quality Index is 1 in the Good category measuring Particulate Matter.

Data courtesy of Lane Regional Air Protection Agency (LRAPA)

 

 

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Advisories:

• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 PM FRIDAY ABOVE 5,000 FT. FOR THE CASCADES IN LANE COUNTY
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 6 AM FRIDAY ABOVE 4,000 FT. FOR THE NORTHERN OREGON CASCADES
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 11 PM FRIDAY FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON, OCHOCO, THE JOHN DAY HIGHLANDS, AND THE EAST SLOPES OF THE OREGON CASCADES.
• A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 5 PM FRIDAY ABOVE 4,500 FT. FOR THE SOUTH CENTRAL OREGON CASCADES.
• 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:

Ducks vs Stanford, at Stanford Stadium – Kickoff: 8:00 PM PDT – Clear 60, cooling as the game progresses.

Beavers vs Colorado, at Reser Stadium – Kickoff: 1:00 PM PDT – Partly cloudy 58, warming to 62 then starting to cool by the end of the game.

 

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

• Mostly cloudy with showers likely (70%) tonight, (0.25 in. of rain possible,),
• Mostly cloudy with showers and a bit warmer Friday (0.25 in. of rain possible, more in storms), becoming partly cloudy with a (30%) chance of showers in the evening (under 0.10 in. of rain possible), partly cloudy with patchy fog late Friday night,
• Patchy AM fog, partly cloudy and a bit warmer Saturday afternoon, mostly clear with patchy fog late at night,
• Patchy fog Sunday AM, mostly sunny and a bit warmer in the afternoon, mostly clear with patchy fog late Sunday night.
• lows 44-39 highs 55-64.
• Patchy AM fog, mostly sunny and a bit warmer Monday afternoon, partly cloudy at night,
• A mix of clouds and sun and a bit cooler with a good (50%) chance of rain Tuesday, mostly cloudy with a good (50%) chance of rain Tuesday night,
• Mostly cloudy with rain likely (70%) Wednesday and Thursday, rain Wednesday night.
• highs 65-56 lows 44-47. (seasonal averages high 66 low 42)

 

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Forecast for Roseburg:

• Mostly cloudy with showers this evening, showers likely (70%) late tonight (0.25 in. of rain possible),
• AM showers, mostly cloudy and a bit warmer with showers likely (70%) Friday afternoon (under 0.10 in. of rain possible), a (30%) chance of evening showers, partly cloudy late Friday night,
• Then sunny and a bit warmer Saturday and Sunday, mostly clear both nights,
• lows 46-36 warming to 42 Sunday night highs 57-69.
• Mostly sunny and a bit warmer Monday, mostly clear at night,
• Partly cloudy and a bit cooler with a (30%) chance of rain Tuesday, mostly cloudy with a (40%) chance of rain Tuesday night,
• Then rain likely (70%) and a bit cooler Wednesday and Thursday, rain Wednesday night.
• highs 72-59 lows 46-48. (seasonal averages high 68 low 45)

 

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

• Mostly cloudy with showers tonight (0.25 in. of rain possible),
• Mostly cloudy and a bit cooler with showers likely (70%) Friday (0.25 in. of rain possible), a (30%) chance of evening showers, partly cloudy late Friday night,
• Sunny and a bit warmer Saturday, clear Saturday night,
• Sunny and a bit warmer Sunday, mostly clear at night.
• lows 48-42 warming to 46 Saturday night highs 57-62.
• Mostly sunny and a bit warmer Monday, mostly clear at night,
• Mostly cloudy and a bit cooler with a (40%) chance of rain Tuesday and Tuesday night,
• Then rain likely (70%) and a bit cooler Wednesday and Thursday, rain Wednesday night.
• highs 63-56 lows 50-52 cooling back to 50 Wednesday night. (seasonal averages high 62 low 46)

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Forecast for the Cascades in Lane County:

• Mostly cloudy with rain and snow showers tonight (0.75 in. of rain possible, 6-10 in. of snow possible),
• Rain and snow showers and a bit cooler Friday (0.50 in. of rain possible, 4-8 in. of snow possible), rain and snow showers likely (70%) in the evening (under 0.10 in. of rain possible, 1 in. of snow possible), partly cloudy and colder late Friday night,
• Then mostly sunny and a bit warmer Saturday and Sunday, mostly clear both nights,
• snow level 4,500 ft. rising to 5,000 ft. tonight, 4,000 ft. Friday, 5,000 ft. Friday evening, free air freezing level 7,000 ft. rising to 11,000 ft. Saturday, 11,000 ft. Saturday night, then 12,000 ft. Sunday and Sunday night.
• lows 32-22 warming to 33 Sunday night highs 35-53.
• Mostly sunny and a bit warmer Monday, mostly clear at night,
• Partly cloudy and a bit cooler with a good (50%) chance of rain Tuesday, mostly cloudy a good (50%) chance of rain Tuesday night,
• Rain likely (70%) and a bit cooler Wednesday, then rain and a bit cooler Wednesday night and Thursday.
• free air freezing level 12,000 ft. Monday and Monday night, snow level 8,000 ft. Tuesday, above 8,000 ft. Tuesday night and Wednesday, 8,000 ft. Wednesday night, then 6,000 ft. Thursday.
• highs 57-36 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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