Clouds followed by sun with a slight chance of showers Thursday afternoon.



Check out my latest Eugene Daily News Weather Or Not Column Remember, The First “Marathon Man” Finished Both The Race And His Life.



Here is my new weekly weather quiz question. What is the difference between a “nautical mile” and a “statute mile?” 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 has just 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) is moving slowly to the North away from us. High pressure will spread our way from the southeast to clear us out. A weakening cold front will fall apart as it moves through Oregon tonight and Thursday. Another low is starting its journey toward the Oregon coast later this week.

The Perseid meteor shower is in progress. The maximum number of “shooting stars” from the comet Swift-Tuttle will be visible very early this morning, before sunrise. There could have been as many as 50 sighted per hour as they move from the NE quadrant of the sky, but now that number is diminishing rapidly. For best viewing go to where there are no city lights to brighten the sky. You also need for the clouds to clear off, at least a bit, so you can see the sky. The meteor shower will continue for the next few days, but the number you might see will slowly taper off.



The Grass Pollen Count is listed as Absent at 0 and Tree pollen is Low at 2 as of 8/14/13 according to Oregon Allergy Associates.



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

Mostly cloudy tonight, cloudy Thursday AM, a mix of clouds and sun with a slight (20%) chance of showers in the afternoon, mostly cloudy with a slight (20%) chance of evening showers, mostly cloudy late Thursday night.

A mix of clouds and sun Friday, partly cloudy in the evening, mostly cloudy Friday night. Then partly cloudy Saturday and Saturday night.

lows 57-60 cooling to 54 Saturday night highs 78-82.

Partly cloudy Sunday AM, mostly sunny in the afternoon through Wednesday.

highs 85-88 cooling to 85 Wednesday lows near 54. (seasonal averages high 83 low 51)


Forecast for the Umpqua Basin including Roseburg:

Mostly cloudy with areas of smoke tonight and Thursday AM, partly cloudy with areas of smoke and a slight (20%) chance of showers in the afternoon, mostly cloudy with more smoke Thursday night and Friday AM, partly cloudy with more smoke and a slight (20%) chance of thunderstorms in the afternoon, and evening, with areas of fog with smoke continuing Friday night.

Then partly cloudy with areas of smoke Saturday and Saturday night.

highs 92-86 lows 62-59.

AM clouds with sunny skies in the afternoon with areas of smoke Sunday, mostly clear with areas of smoke Sunday night.

Then mostly sunny with patchy smoke Monday through Wednesday with mostly clear nights.

highs 90-93 cooling to 88 Wednesday lows 60-58. (seasonal averages high 85 low 56)





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

Cloudy with a slight (20%) chance of coastal showers tonight and Thursday while a slight (20%) chance of inland afternoon showers, a slight (20%) chance of evening showers with patchy coastal fog late Thursday night, patchy AM fog and a slight (20%) chance of drizzle while mostly cloudy inland, mostly cloudy with patchy fog Friday night.

Mostly cloudy with patchy AM fog, partly cloudy Saturday afternoon and evening, then mostly cloudy late Saturday night.

lows 58-53 highs 66-64.

Mostly cloudy Sunday AM, sunny in the afternoon, partly cloudy with patchy fog Sunday night and Monday, mostly clear Monday night, then mostly sunny Tuesday and Wednesday with clear skies Tuesday night.

highs 64-60 lows near 52. (seasonal averages high 65 low 53)




Forecast for the Cascades of Lane County

Partly cloudy tonight through Thursday night, a mix of clouds and sun Friday AM with a slight (20%) chance of showers, a (30%) chance of showers and thunderstorms in the afternoon, partly cloudy with a slight (20%) of evening showers and thunderstorms, then just partly cloudy late Friday night through Saturday night.

free air freezing level 14,000 ft. tonight and Thursday, 14,000 ft. falling to 13,000 ft. Thursday night, snow level above 8,000 ft. Friday and Friday night, free air freezing level 14,000 ft. Saturday, then 14,000 ft. rising to 15,000 ft. Saturday night.

lows 50-48 highs near 70.

Mostly sunny Sunday and Monday, mostly clear at night, mostly sunny Tuesday, mostly clear at night, then sunny Wednesday.

free air freezing level 15,000 ft. rising to 16,000 ft. Sunday afternoon, 16,000 ft. Sunday night through Monday night, 16,000 ft. falling to 15,000 ft. Tuesday afternoon, 15,000 ft. falling to 14,000 ft. Tuesday night and Wednesday.

highs 73-77 cooling to 74 Wednesday lows near 48.



**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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