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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. Look for a chance of showers and thunderstorms for your Thursday as the low slides into 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 (3:30 PM EDT)- Partly cloudy, temperature near 80 cooling through the 70s as the game progresses.

The Beavers vs Hawaii at Reser Stadium, Corvallis: Kickoff 5:00 PM- 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:

• Mostly cloudy with showers and a (30%) chance of thunderstorms this AM, showers with a slight (20%) chance of thunderstorms this afternoon (0.50 in. of rain possible, more in storms), showers likely (70%) this evening, a good (50%) chance of showers tonight (0.25 in of rain possible).
• Cloudy with a (40%) chance of AM showers, a mix of clouds and sun Friday afternoon
• with a slight (20%) chance of showers, partly cloudy Friday night (under 0.10 in. of rain possible).
• Partly cloudy Saturday AM, mostly sunny in the afternoon, then partly cloudy Saturday night.
• highs 72-80 lows 57-52 warming to 55 Saturday night.
• Mostly sunny Sunday, partly cloudy Sunday night.
• Mostly sunny Monday through Wednesday with mostly clear nights.
• highs 84-87 lows 53-56. (seasonal averages high 80 low 49)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms this AM, showers likely (70%) with a slight (20%) chance of scattered thunderstorms this afternoon and evening (0.15 in. of rain possible), a (40%) chance of evening showers and a slight (20%) chance of thunderstorms, a slight (20%) chance of showers late tonight (under 0.10 in. of rain possible).
• Mostly cloudy with a slight (20%) chance of showers Friday AM, partly cloudy and warmer in the afternoon, partly cloudy in the evening, mostly clear Friday night.
• Sunny Saturday then clear Saturday night.
• highs 72-86 lows 55-58.
• Mostly sunny Sunday and Monday, mostly clear at night.
• Sunny Tuesday, mostly clear at night.
• Mostly sunny Wednesday.
• highs near 86-90 lows near 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 areas of fog and a (30%) chance of coastal showers and a slight (20%) chance of thunderstorms late this AM, coastal showers likely (60%) with isolated thunderstorms this afternoon while showers likely (60%) and a slight (20%) chance of thunderstorms inland today (under 0.10 in. of rain possible, more in storms), mostly cloudy with (40%) chance of showers with patchy fog late tonight (under 0.10 in. or rain possible).
• Mostly cloudy Friday with patchy fog and a slight (20%) chance of AM showers, mostly cloudy in the afternoon, partly cloudy at night.
• Partly cloudy Saturday AM, sunny in the afternoon, clear Saturday night.
• highs near 68 lows near 56.
• Mostly sunny Sunday throughWednesday, mostly clear nights.
• highs 69-72 lows 58-56. (seasonal averages high 66 low 52)

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Forecast for the Cascades of Lane County:

• Showers likely (60%) and a slight (20%) chance of thunderstorms this AM, mostly cloudy with good (50%) chance of showers and a slight (20%) chance of thunderstorms this afternoon and evening (0.50 in. of rain possible, more in storms), partly cloudy with a slight (20%) chance of showers late Thursday night (0.10 in. of rain possible, more in storms).
• Mostly cloudy with a (30%) chance of showers Friday AM, a slight (20%) chance of showers in the afternoon, just partly cloudy Friday night.
• Mostly sunny Saturday, then partly cloudy Saturday 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, 13,000 ft. rising to 14,000 ft. Saturday and Saturday night.
• highs 57-67 lows 42-46.
• Mostly sunny Sunday through Wednesday with mostly clear skies at night.
• free air freezing level 14,000 ft. Sunday, 14,000 ft. rising to 15,000 ft. Sunday night and Monday, 15,000 ft. falling to 14,000 ft. at night, 14,000 ft. rising to 15,000 ft Tuesday, 15,000 ft. rising to 16,000 ft. late Tuesday night, then 16,000 ft. falling to 14,000 ft. Wednesday.
• highs 73-79 cooling to 76 Wednesday lows 48-54.

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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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