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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 moving to the east. Look for a chance of showers and thunderstorms for your Friday as the low slides out of Oregon.  The National Weather Service 88-D Doppler Radar shows where the upper low is positioned as you can see by the counter-clockwise rotation of the whole radar image. 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 Low at 2 and Tree pollen is Absent at 0 as of 8/31/13 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)- Sunny, temperature near 80 cooling down 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 near 80 cooling down 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 rain this AM, a mix of clouds and  this afternoon with a slight (20%) chance of showers (under 0.10 in. of rain possible), partly cloudy tonight.
• A mix of clouds and sun Saturday AM, mostly sunny in the afternoon, clear Saturday night.
• Partly cloudy Sunday AM, sunny in the afternoon, clear in the evening, partly cloudy Sunday night.
• highs 75-85 lows 52-55.
• Mostly sunny Monday through Wednesday with mostly clear nights Monday and Tuesday, partly cloudy Wednesday night and Thursday AM, then mostly sunny Thursday afternoon.
• highs 84-87 cooling to near 80 Thursday lows 53-57. (seasonal averages high 80 low 49)

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Forecast for the Umpqua Basin including Roseburg:

• Cloudy with a slight (20%) chance of showers this AM, partly cloudy and warmer this afternoon, partly cloudy tonight and Saturday AM, sunny Saturday afternoon and Sunday with clear skies at night.
• highs 78-87 lows 54-60.
• Sunny Monday, clear at night.
• Mostly sunny Tuesday and Wednesday, mostly clear in the evening and partly cloudy late at night.
• Partly cloudy with a slight (20%) chance of thunderstorms Thursday .
• highs near 86-90 cooling to 86 Thursday 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 today with patchy fog and a slight (20%) chance of AM showers, partly cloudy this afternoon, mostly clear this evening, mostly cloudy tonight and Saturday AM with patchy AM fog, sunny in the afternoon, clear Saturday night.
• AM clouds and patchy fog, sunny Sunday and clear at night.
• highs 68-72 lows 55-58.
• Sunny Monday, mostly clear at night.
• Mostly sunny Tuesday and Wednesday, mostly clear Tuesday night, then partly cloudy Wednesday night and Thursday.
• highs near 72 lows near 57. (seasonal averages high 66 low 52)

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Forecast for the Cascades of Lane County:

• Mostly cloudy with rain this AM, a mix of clouds and sun with a slight (20%) chance of showers this afternoon, just partly cloudy tonight (under 0.10 in. of rain possible).
• Mostly sunny and warmer Saturday, clear Saturday night.
• Sunny Sunday, then mostly clear at night.
• snow level above 8,000 ft. today, free air freezing level 12,000 ft. rising to 13,000 ft. late Friday night, 13,000 ft. Saturday, 13,000 ft. rising to 14,000 ft. Saturday night, 14,000 ft. rising to 15,000 ft. Sunday, then 15,000 ft. Sunday night.
• highs 62-74 lows 42-48.
• Mostly sunny Monday through Thursday with mostly clear skies at night.
• free air freezing level 15,000 ft. Monday, 15,000 ft. rising to 16,000 ft. at night, 16,000 ft. Tuesday through Wednesday, 16,000 ft. falling to 15,000 ft. Wednesday night, then 15,000 ft. falling to 14,000 ft. Thursday.
• highs 73-79 cooling to 72 Wednesday lows 50-55 cooling to 50 Wednesday night.

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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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