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Check out my latest Eugene Daily News Weather Or Not Column Remember What Don Essig Always Says. Really?

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Here is my new weekly weather quiz question. What is a “wall cloud?”  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) is moving to the north away from us.  Now the upper airflow is moving from the south producing the chance of showers and thunderstorms as the upper low rides north. Another upper level low will move in along the coast continuing the normal to cooler than normal temperatures. The Eugene Celebration runs Friday through Sunday and so far the weather is looking pretty good. Look for cooler temperatures with just a slight chance of AM drizzle Saturday and a slight chance of a shower Sunday. With temperatures dropping from the heat we’ve been having to just a bit cooler than normal you will need to dress accordingly.

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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:

• Cloudy this AM, partly cloudy this afternoon and evening, cloudy late tonight mostly cloudy with patchy drizzle Saturday AM, mostly cloudy in the afternoon and Saturday night, mostly cloudy with a slight (20%) chance of showers Sunday, then partly cloudy Sunday night.
• highs near 77 lows 57-52.
• Partly cloudy Monday and in the evening, Monday evening, mostly cloudy with a slight (20%) chance of rain late Monday night and Tuesday AM, a slight (20%) chance of showers in the afternoon and evening, mostly cloudy late Tuesday night and Wednesday AM, then a mix of clouds and sun Wednesday afternoon and Thursday while mostly cloudy Wednesday evening and partly cloudy late Wednesday night.
• highs near 80 lows near 52. (seasonal averages high 82 low 51)

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Forecast for the Umpqua Basin including Roseburg:

• Areas of smoke today, cloudy with patchy fog in the AM, partly cloudy with areas of smoke this afternoon and evening, mostly cloudy with patchy fog and areas of smoke late at night and Saturday AM, mostly cloudy with more smoke in the afternoon, mostly cloudy with areas of smoke Saturday night.
• Mostly cloudy with areas of AM smoke and a slight (20%) chance of a thunderstorm, mostly cloudy with a slight (20%) chance of showers Sunday afternoon, mostly cloudy in the evening, then partly cloudy late Sunday night.
•  highs 80-76 lows 58-55.
• Partly cloudy Monday and in the evening, mostly cloudy Monday night, mostly cloudy with a slight (20%) chance of showers Tuesday afternoon through Wednesday AM, then partly cloudy Wednesday night and Thursday.
• highs near 82 lows 58-54. (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 AM fog and patchy coastal drizzle, mostly cloudy this afternoon, partly cloudy this evening, mostly cloudy with patchy fog and areas of drizzle late tonight.
• Mostly cloudy with patchy AM fog and patchy drizzle, mostly cloudy with patchy lingering fog Saturday and Saturday night. Mostly cloudy Sunday with patchy fog and a slight (20%) chance of AM showers inland, partly cloudy at night.
• highs 66-68 lows 56-53.
• Partly cloudy Monday AM, mostly cloudy in the afternoon, a slight (20%) chance of showers Monday night through Wednesday.
• Then partly cloudy Wednesday night and Thursday.
• highs near 67 lows near 55. (seasonal averages high 66 low 53)

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Forecast for the Cascades of Lane County:

• Partly cloudy today and this evening, mostly cloudy late tonight.
• Mostly cloudy Saturday with a (30%) chance of showers in the afternoon and a slight (20%) chance of showers Saturday night.
• Cloudy with a (40%) chance of showers Sunday, mostly cloudy in the evening with a slight (20%) chance of showers, then partly cloudy late Sunday night.
• free air freezing level 13,000 ft. today and tonight, snow level above 8,000 ft. Saturday through Sunday evening, free air freezing level 11,000 ft. late Sunday night.
• highs 67-63 lows near 45.
• Partly cloudy with with a slight (20%) chance of Monday and again late Monday night, partly cloudy with a slight (20%) chance of rain Tuesday AM, partly cloudy in the afternoon and Tuesday night, a mix of clouds and sun with a slight (20%) chance of showers Wednesday afternoon, partly cloudy with a slight (20%) chance of showers Wednesday evening, then partly cloudy Wednesday night and Thursday.
• snow level above 8,000 ft. Monday through Tuesday AM, free air freezing level 12,000 ft. Tuesday afternoon, 12,000 ft. rising to 13,000 ft. at night, 13,000 ft. Wednesday AM, snow level above 8,000 ft. Wednesday afternoon and evening, then free air freezing level 13,000 ft. late Wednesday night and Thursday.
• Highs 66-70 lows near 45.

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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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