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Check out my latest Eugene Daily News 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 that continues for Dexter Reservoir and Dorena Reservoir, and now Fern Ridge Reservoir has been added to the list. 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 (“U” shape with blue arrows) along the coast will continue to send disturbances our way including this frontal system that will move through the Pacific Northwest by late today. That will keep us in a cooler and potentially wet weather pattern for the week. Yet another frontal system will move into Oregon by the end of next week.

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The Grass Pollen Count is listed as Absent at 0 and Tree pollen is Absent at 0 as of 8/22/13 according to Oregon Allergy Associates.

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

• Mostly cloudy this AM, partly cloudy this afternoon, mostly cloudy with a slight (20%) chance of rain late tonight (under 0.10 in. of rain possible).
• Mostly cloudy in the AM,  partly cloudy in the afternoon and evening, mostly cloudy late Tuesday night and Wednesday AM, a mix of clouds and sun in the afternoon, partly cloudy in the evening, then mostly cloudy late Wednesday night.
• highs 77-85 cooling to 83 Wednesday lows near 54.
• Mostly cloudy Thursday AM, then partly cloudy Thursday afternoon and evening, mostly cloudy late Thursday night.
• A mix of clouds and sun Friday and Saturday with partly cloudy skies in the evening and mostly cloudy at night Friday night, then mostly cloudy late Saturday night with a slight (20%) chance of showers.
• Mosty cloudy with a slight (20%) chance of showers Sunday AM, then just partly cloudy Sunday afternoon.
• highs 82-77 lows 57-53. (seasonal averages high 82 low 50)

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Forecast for the Umpqua Basin including Roseburg:

• Mostly cloudy this AM, partly cloudy this afternoon, mostly cloudy this evening, partly cloudy late tonight through Tuesday evening, mostly cloudy late at night.
• Mostly cloudy Wednesday, then partly cloudy Wednesday night.
• highs 81-85 lows 58-61.
• Partly cloudy Thursday, partly cloudy with a slight (20%) chance of showers Thursday night and Friday, mostly cloudy Friday night and Saturday, partly cloudy with a slight (20%) chance of showers Saturday night and Sunday.
• highs 83-80 lows 61-58. (seasonal averages high 84 low 55)

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

• Mostly cloudy with patchy coastal fog this AM, partly cloudy with a slight (20%) chance of rain this afternoon and evening, mostly cloudy tonight with coastal fog and a slight (20%) chance of coastal rain late at night.
• Mostly cloudy with patchy AM coastal fog Tuesday, a slight (20%) chance of coastal rain with patchy coastal fog Tuesday night.
• Mostly cloudy with a slight (20%) chance of coastal rain Wednesday,  and a slight (20%) chance of rain Wednesday night.
• highs 67-70 lows 55-58.
• Mostly cloudy with a slight (20%) chance of AM rain, partly cloudy with a slight (20%) chance of showers Thursday afternoon through Sunday.
• highs 67-65 lows 56-53. (seasonal averages high 66 low 53)

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Forecast for the Cascades of Lane County:

• A mix of clouds and sun with a slight (20%) chance of thunderstorms this afternoon, partly cloudy tonight and Tuesday AM, mostly sunny in the afternoon, partly cloudy with a slight (20%) chance of evening rain, then partly cloudy Tuesday night through Wednesday night.
• snow level above 8,000 ft. today, free air freezing level 11,000 ft. rising to 12,000 ft. tonight, 12,000 ft. rising to 13,000 ft. Tuesday, snow level above 8,000 ft. Tuesday night, then free air freezing level 13,000 ft. Wednesday, 13,000 ft. falling to 12,000 ft. Wednesday night.
• highs 67-70 lows 45-47 cooling to near 45 Wednesday night.
• Partly cloudy with a slight (20%) chance of showers Thursday afternoon through Sunday AM, then just partly cloudy Sunday afternoon.
• free air freezing level 12,000 ft. Thursday AM, snow level above 8,000 ft. Thursday afternoon, snow level above 8,000 ft. in the evening, free air freezing level 12,000 ft. late Thursday night and Friday AM, snow level above 8,000 ft. in the afternoon and evening, free air freezing level 12,000 ft. late Friday night and Saturday AM, snow level above 8,000 ft. Saturday afternoon through Sunday AM, then free air freezing level 12,000 ft. Sunday afternoon.
• highs 70-64 lows 48-44.

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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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