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Check out my latest Eugene Daily News Weather Or Not Column What’s In A Name? It’s “Deja Vu” All Over Again.

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Here is my weekly weather quiz question. What is “Popcorn Convection?” Please remember to post your answer as a comment by clicking on “no comments /comments” in the upper right hand portion of this page under the caption, then add your comment. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs. The answer has to be a comment to win. An email answer will not count. Good luck.

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Advisories:

A Blue-Green Algae warning continues for Dexter Reservoir, Dorena Reservoir, and Fern Ridge Reservoir.  Water monitoring has confirmed the presence of blue-green algae that can produce toxins, state public health officials said. The algae levels are likely associated with dangerous cyanotoxin concentrations in the water that can be harmful to humans and animals. Swallowing or inhaling water droplets, as well as skin contact with water, should be avoided according to the authorities.

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An upper level low pressure trough (Shaded area “U” shape offshore) is slowly starting to move our way. We’ll have one more day with lots of sunshine, then a chance of showers and thunderstorms for your Thursday as the low slides through Oregon.  Autumn begins at 1:44 PM Friday September 22nd so Summer is nearly over.

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The Grass Pollen Count is listed as Absent at 0 and Tree pollen is Low at 2 as of 8/27/13 according to Oregon Allergy Associates. The Season is over.

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Your Saturday College Football Forecasts:

The Ducks vs Virginia at Scott Stadium, Charlottesville, Virginia: Kickoff 12:30 PM- Partly cloudy, temperature near 83 cooling through the 70s as the game progresses.

The Beavers vs Hawaii at Reser Stadium, Corvallis: Kickoff 5:00 PM- Mostly sunny, temperature at day’s high of 80 cooling through the 70s as the game concludes.

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

• A mix of clouds and sun today, mostly cloudy with a (40%) chance of showers and a slight (20%) chance of thunderstorms this evening, mostly cloudy with showers likely (60%) and a slight (20%) chance of thunderstorms late tonight (0.15 in. of rain possible, more in storms).
• Mostly cloudy with showers likely (60%) and a (30%) chance of thunderstorms Thursday (0.25 in. of rain possible, more in storms), a good (50%) chance of showers Thursday night.
• A mix of clouds and sun Friday with a (40%) chance of AM showers, then partly cloudy Friday night.
• highs 80-73 warming to 78 Friday lows 57-52.
• Partly cloudy Saturday AM, mostly sunny in the afternoon, partly cloudy Saturday night and Sunday AM, mostly sunny then Sunday afternoon, Monday, and Tuesday, partly cloudy Sunday night and mostly clear Monday night.
• highs 80-84 cooling to near 80 Tuesday lows 50-57. (seasonal averages high 80 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a slight (20%) chance of isolated showers and thunderstorms this afternoon, a slight (20%) of evening thunderstorms, a (30%) chance of scattered showers late tonight (under 0.10 in. of rain possible).
• Mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Thursday (0.15 in. of rain possible), a (40%) chance of evening showers, partly cloudy late Thursday night (under 0.10 in. of rain possible).
• Mostly cloudy Friday AM, partly cloudy and warmer in the afternoon, partly cloudy in the evening, mostly clear Friday night.
• highs 80-72 warming to near 80 Friday lows 57-54.
• Mostly sunny Saturday through Tuesday with mostly clear at night.
• highs near 85-87 lows 55-60. (seasonal averages high 82 low 54)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:

• Mostly cloudy with patchy AM fog, mostly cloudy with isolated coastal showers this afternoon and evening while isolated evening thunderstorms inland, a (30%) chance of  isolated showers tonight and patchy fog late.
• Mostly cloudy with patchy AM coastal fog and a (30%) chance of showers while a good (50%) chance of showers and a slight (20%) chance of thunderstorms inland in the afternoon (0.10 in. of rain possible, more in storms), partly cloudy with a (30%) chance of coastal showers in the evening while a (40%) chance of evening inland showers,  just mostly cloudy late Thursday night (under 0.10 in. or rain possible).
• Mostly cloudy Friday AM, partly cloudy in the afternoon and evening, then mostly cloudy at night.
• highs 70-66 warming to 69 Friday lows near 55.
• Mostly sunny Saturday through Tuesday with mostly clear nights
• highs near 70 lows near 56. (seasonal averages high 66 low 52)

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Forecast for the Cascades of Lane County:

• Partly cloudy with a (30%) chance of showers and a slight (20%) chance of thunderstorms this afternoon and evening, showers likely (60%) and a slight (20%) chance of thunderstorms late tonight (0.25 in. of rain possible, more in storms) and Thursday AM, mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Thursday afternoon and evening, partly cloudy with a slight (20%) chance of showers late at night.
• A mix of clouds and sun Friday with a slight (20%) chance of AM showers, then just partly cloudy Friday night.
• snow level above 8,000 ft. today through Friday, free air freezing level 12,000 ft. rising to 13,000 ft. late Friday night.
• highs 68-57 warming to 65 Friday lows 45-40 warming to 45 Friday night.
• Partly cloudy Saturday AM, mostly sunny in the afternoon, partly cloudy at night.
• Mostly sunny Sunday, Monday, and Tuesday with mostly clear skies at night.
• free air freezing level 13,000 ft. rising to 14,000 ft. Saturday, 14,000 ft. rising to 15,000 ft. Saturday night, then 15,000 ft. Sunday through Tuesday.
• highs 68-73 lows 46-50.

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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 Eugene Daily News.com.

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