_______________
Check out my latest Eugene Daily News Weather Or Not Column Remember What Don Essig Always Says. Really?
________________
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.
________________
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.
________________
An upper level low (“U” shape with blue arrows) has moved to the south away from us and will move eastward through California. A weak cold front moved through Oregon having little or no effect. The upper airflow will be coming from just about due-West which is called “Zonal Flow.” Next, the low off California will move northeastward producing the chance of thunderstorms.
________________
The Grass Pollen Count is listed as Low at 2 and Tree pollen is Absent at 0 as of 8/17/13 according to Oregon Allergy Associates.
________________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
Clear tonight, mostly sunny and warm Wednesday, mostly clear in the evening, partly cloudy late Wednesday night.
Then a mix of clouds and sun Friday with increasing clouds to mostly cloudy by late Friday night.
lows near 52-58 cooling to 54 Friday night highs 92-83.
Mostly cloudy Saturday AM, partly cloudy in the afternoon and evening, mostly cloudy late Saturday night.
Just a mix of clouds and sun Sunday and Monday with partly cloudy skies at night, then partly cloudy Monday night and Tuesday.
highs 78-82 cooling to near 80 Tuesday lows 55-52. (seasonal averages high 83 low 51)
________________
Forecast for the Umpqua Basin including Roseburg:
Partly cloudy with areas of smoke late tonight.
Partly cloudy with more patchy smoke and a slight (20%) chance of isolated thunderstorms Wednesday, partly cloudy with patchy smoke and a slight (20%) chance of isolated thunderstorms Wednesday night.
Areas of AM smoke, mostly cloudy with a slight (20%) chance of isolated thunderstorms Thursday afternoon and evening, areas of smoke again late Thursday night.
Mostly cloudy with areas of smoke Friday AM, partly cloudy with areas of smoke in the afternoon, mostly cloudy with patchy fog with areas of smoke Friday evening, patchy fog and areas of smoke continue late at night.
lows 58-63 cooling to 56 Friday night highs 95-85.
Mostly cloudy with patchy AM fog and areas of smoke Saturday, mostly cloudy with more patchy smoke late Saturday night and Sunday, mostly cloudy in the evening, then partly cloudy Sunday night through Tuesday.
highs 83-80 warming to 84 Tuesday lows 58-52. (seasonal averages high 84 low 55)
_________________
Forecast for the South Oregon Coast including Coos Bay and North Bend:
Mostly clear with patchy coastal fog late tonight.
Partly cloudy with patchy AM coastal fog Wednesday, partly cloudy in the evening at the shore and cloudy with patchy coastal fog late Wednesday night while partly cloudy inland at night.
Mostly cloudy with patchy coastal fog Thursday AM, partly cloudy in the afternoon, mostly cloudy Thursday night.
Partly cloudy Friday, then mostly cloudy with patchy fog Friday night.
lows 52-56 highs 68-64 warming to 67 Friday.
Mostly cloudy with patchy fog Saturday through Sunday, partly cloudy Sunday night through Monday evening, mostly cloudy at night and Tuesday AM, then partly cloudy Tuesday afternoon.
highs near 69 lows near 54. (seasonal averages high 66 low 53)
________________
Forecast for the Cascades of Lane County:
Mostly clear tonight.
Mostly sunny Wednesday AM, partly cloudy with a slight (20%) chance of thunderstorms in the afternoon and Wednesday night.
A mix of clouds and sun with a slight (20%) chance of showers and thunderstorms Thursday, mostly cloudy with a slight (20%) chance of showers and thunderstorms in the evening, mostly cloudy late Thursday night.
Partly cloudy with a slight (20%) chance of AM showers, just partly cloudy Friday afternoon, then increasing clouds to mostly cloudy Friday night.
free air freezing level 15,000 ft. tonight, snow level above 8,000 ft. Wednesday through Friday, then free air freezing level 12,000 ft. Friday night.
lows 49-55 cooling to near 49 Friday night highs 80-72.
Partly cloudy with a slight (20%) chance of showers Saturday afternoon, partly cloudy in evening, then mostly cloudy with a slight (20%) chance of showers late Saturday night.
A mix of clouds and sun with a slight (20%) chance of showers Sunday, partly cloudy in the evening, mostly 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, partly cloudy with a slight (20%) chance of showers in the evening, then partly cloudy late Monday night and Tuesday.
snow level above 8,000 ft. Saturday through Monday night, then free air freezing level 12,000 ft. Tuesday.
highs near 68-70 lows 49-45.
________________
**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.
________________
Get your local Eugene-Springfield and Lane County news on-line at Eugene Daily News.com.
________________