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Check out my latest Eugene Daily News Weather Or Not Column I Wonder How The Dam Thing Works and my new Feature Story How Medical Science Changed My Life.

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We have a winner!

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Congratulations to Josh Foster for being the first person to post the correct answer my new weekly weather quiz question. Here is the question again. Please define “a warm occlusion” and no it has nothing to do with a dental overbite. Here is Josh’s correct answer: In a warm occlusion, the air mass overtaking the warm front is not as cool as the cold air ahead of the warm front, and rides over the colder air mass while lifting the warm air. There are both warm and cold occluded fronts. Josh wins a week of free personalized weather forecasts tailored to his needs. I’ll have a new weekly weather quiz question starting next Monday. 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:

There is 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 disturbance (Small shaded area) is moving away from us and a frontal system fell apart as it pushed into the Pacific Northwest. We will warm up a bit then cool back down again as yet another frontal system will move into Oregon over the Labor Day Holiday weekend and stall. An upper level low (shaded area offshore in first graphic) will take control of our weather for early next week.

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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.

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Saturday College Football Forecast:

Ducks vs Nicholls State: Kickoff at 1 PM at Autzen Stadium- Sunny 78 degrees warming to 86 during the game, wind: N 5-10 mph.

Beavers vs Eastern Washington: Kickoff at 3 PM at Reser Stadium- Sunny 84 degrees warming to 86 then cooling toward the end of the game, wind: N 5-10 mph.

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

• Mostly clear tonight.
• Partly cloudy Saturday AM, sunny in the afternoon, mostly clear in the evening, partly cloudy late Saturday night.
• A mix of clouds and sun Sunday AM, mostly sunny in the afternoon, partly cloudy with a slight (20%) chance of showers late Sunday night.
• A mix of clouds and sun with a slight (20%) chance of showers Monday (Labor Day), partly cloudy in the evening, then mostly cloudy with a slight (20%) chance of showers late Monday night.
• lows 55-58 cooling to 56 Monday night highs 86-77.
• A mix of clouds and sun with a slight (20%) chance of showers Monday, partly cloudy in the evening, mostly cloudy with a slight (20%) chance of showers at night, mostly cloudy in the AM, partly cloudy Wednesday and in the evening, mostly cloudy late at night,
• A mix of clouds and sun Thursday, then partly cloudy Thursday night and Friday.
• highs near 78 lows near 55. (seasonal averages high 81 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly clear tonight.
• Sunny and warmer Saturday, clear in the evening, partly cloudy with patchy fog late Saturday night.
• Mostly cloudy with patchy fog in the AM, sunny Sunday afternoon, mostly clear in the evening, partly cloudy with a slight (20%) chance of showers late Sunday night.
• Partly cloudy with a slight (20%) chance of showers Monday (Labor Day) and Monday night.
• lows 62-57 highs 88-80.
• Partly cloudy with a slight (20%) chance of showers Tuesday AM, partly cloudy Tuesday night through Wednesday night, partly cloudy with a slight (20%) chance of showers Thursday, partly cloudy Thursday afternoon and Friday AM, then sunny Friday afternoon.
• highs near 82-80 warming to 84 Friday lows near 55. (seasonal averages high 83 low 54)

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

• Partly cloudy this evening, mostly cloudy with patchy coastal fog late tonight.
• Sunny Saturday, partly cloudy in the evening, mostly cloudy with patchy coastal fog Saturday night.
• Mostly cloudy with patchy fog in the AM, sunny Sunday afternoon, partly cloudy in the evening, mostly cloudy with a (30%) chance of coastal showers Sunday night while mostly clear in the evening inland and mostly cloudy with a (30%) chance of showers late at night.
• Mostly cloudy with a (30%) chance of showers Monday (Labor Day), a slight (20%) chance of showers Monday night.
• lows 56-60 cooling to 56 Monday night highs 67-70.
• Mostly cloudy Tuesday AM with a (30%) chance of showers, partly cloudy with a slight (20%) chance of showers Tuesday through Wednesday, partly cloudy Wednesday evening, mostly cloudy late Wednesday night. Mostly cloudy with a slight (20%) chance of showers Thursday AM, partly cloudy with a slight (20%) chance of showers Thursday afternoon, then just partly cloudy Thursday night and Friday.
• highs near 69 lows 56-54. (seasonal averages high 66 low 52)

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Forecast for the Cascades of Lane County:

• Mostly clear tonight.
• Sunny and warmer Saturday, mostly clear at night.
• AM sunshine, partly cloudy with a slight (20%) chance of showers Sunday afternoon and Sunday night.
• A mix of clouds and sun with a slight (20%) chance of showers Monday (Labor Day), partly cloudy in the evening then mostly cloudy with a slight (20%) chance of showers at night.
• free air freezing level 14,000 ft. tonight, 15,000 ft. Saturday, 16,000 ft. Saturday night, snow level above 8,000 ft. Sunday through Monday night.
• lows near 48 highs 78-67.

• Mostly cloudy Tuesday AM, partly cloudy with a slight (20%) chance of showers in the afternoon and evening, partly cloudy with a slight (20%) chance of showers late at night.
• A mix of clouds and sun Wednesday with a slight (20%) chance of afternoon showers, mostly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late Wednesday night.
• A mix of clouds and sun with a slight (20%) chance of showers Thursday, then partly cloudy with a slight (20%) chance of showers Thursday night through Friday AM, then just partly cloudy Friday afternoon.
• snow level above 8,000 ft. Tuesday and Tuesday evening, free air freezing level 12,000 ft. late Tuesday night and Wednesday AM, snow level above 8,000 ft. in the afternoon through Friday AM, then free air freezing level 14,000 ft. Friday afternoon.
• highs near 68 lows 47-44.

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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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