Your Thursday will be a bit cooler (yes, I’ve said it again) and then watch the thermometer fall over the weekend to much cooler temperatures just about average for this time of the year.

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Check out my latest Eugene Daily News Weather Or Not Column Waiting For “Armageddon?” Where’s Bruce Willis When You Need Him?

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Here is my weekly weather quiz question. How does the National Weather Service define “Yellow Snow?” And no, this is not a joke. 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. 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 high pressure ridge  (“Arch” shape with blue arrows) still covers the Pacific Northwest. It’s called a “Rex” block because of the way it blocks storms from coming through it. That means more sunshine but temperatures will start to cool off a bit. An upper level low (shaded “U” shape with blue arrows) will slide down from the Gulf of Alaska Saturday and then move to the northeast. A cold front will slowly move down from the northwest between Saturday and that will mean temperatures cooling to the more comfortable mid to low 80s as the front slowly moves across Oregon. The slow cooling will make it more comfortable for fair goers at the Lane County Fair that runs through Sunday and the Relay For Life Friday and Saturday at Willamette High School. So much for today being even a bit cooler than Tuesday. Thursday should be at least a little cooler with the big change over the weekend as previously mentioned.

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The Grass Pollen Count is listed as Moderate at 13 and Tree pollen is Low at 5 as of 7/23/13 and both have risen a bit according to Oregon Allergy Associates.

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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Clear tonight, sunny and not quite as warm (really) Thursday, clear at night, then mostly sunny and a bit cooler Friday and a lot cooler Saturday with clear skies at night lows 56-50 highs 93-84. Cloudy Sunday AM, mostly sunny and a bit cooler in the afternoon, mostly clear in the evening, mostly cloudy late Sunday night and Monday AM, mostly sunny in the afternoon, partly cloudy in the evening, mostly cloudy late Monday night and Tuesday AM, partly cloudy in the afternoon and evening, mostly cloudy Tuesday night and Wednesday AM, then partly cloudy Wednesday afternoon highs near 82 lows near 52. (seasonal averages high 84 low 52)

 

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Forecast for the Umpqua Basin including Roseburg: Partly cloudy with a slight (20%) chance of isolated thunderstorms this evening, mostly clear late tonight, sunny and a touch cooler Thursday, mostly clear at night, partly cloudy in the AM, sunny and as bit cooler in the afternoon, mostly clear Friday night, partly cloudy Saturday AM, sunny in the afternoon, mostly clear clear in the evening, then partly cloudy late Saturday night lows 62-55 highs 95-87. Partly cloudy and much cooler Sunday, partly cloudy Sunday night, AM clouds, sunny Monday afternoon, mostly clear in the evening, partly cloudy late Monday night, cloudy Tuesday AM, partly cloudy in the afternoon, mostly clear in the evening, mostly cloudy late Tuesday night and Wednesday AM, then sunny Wednesday afternoon highs 82-84 warming to 87 Wednesday lows near 56. (seasonal averages high 86 low 57)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening, cloudy late tonight, mostly cloudy with patchy coastal fog Thursday AM, sunny in the afternoon, mostly clear in the evening and partly cloudy late at night inland while mostly cloudy with patchy coastal fog late Thursday night and Friday AM, sunny in the afternoon, mostly clear in the evening, then partly cloudy with patchy coastal fog late Friday night, mostly cloudy with patchy coastal fog Saturday AM, sunny in the afternoon lows 53-50 rising to near 53 Saturday highs 65-63 AM clouds and patchy fog, sunny Saturday afternoon, mostly clear in the evening, mostly cloudy with patchy fog late Saturday night and Sunday, mostly cloudy at night through Monday night, cloudy Tuesday, partly cloudy in the evening, mostly cloudy Tuesday night and Wednesday AM, then sunny Wednesday afternoon highs 65-67 lows near 53. (seasonal averages high 65 low 53)

 

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Forecast for the Cascades of Lane County: Partly cloudy with a slight (20%) chance of thunderstorms this evening, a slight (20%) chance of showers late tonight, mostly sunny Thursday AM, partly cloudy in the afternoon and evening, clear at night, mostly sunny and a bit cooler Friday, mostly clear and cooler Friday night, sunny and much cooler Saturday, then clear Saturday night snow level above 8,000 ft. tonight, free air freezing level 15,000 ft. Thursday through Saturday, then 15,000 ft. falling to 13,000 ft. at night lows 55-45 highs 80-70. Sunny Sunday, clear in the evening, partly cloudy Sunday night, and Monday AM, mostly sunny  in the afternoon, partly cloudy Monday night and Tuesday AM, mostly sunny in the afternoon, then partly cloudy Tuesday night and Wednesday free air freezing level 13,000 ft. Sunday through Wednesday highs near 70 lows 45-42.

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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 news on-line at Eugene Daily News.com.

 

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For more click to continue on to http://timchueyweather4u.com/blog

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