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Check out my new column for the Eugene Daily News What I Used To Call Unusual.
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Here is my weekly weather quiz question. What is “orographic lifting?” 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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An upper level trough of low pressure (shaded “U”shape) has moved away from the Pacific Northwest. Now here comes surface high pressure (Blue “H” over the ocean) combined with high pressure aloft (Shaded “Arch” shape moving into Oregon) that will keep us relatively dry until Friday afternoon. A weak surface high pressure area over the Pacific Ocean (position shown is Saturday) will bring mostly clear skies back for at most of the weekend.
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Advisories: A FROST ADVISORY IS IN EFFECT FROM 3 AM UNTIL 8 AM THURSDAY FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, AND JACKSON COUNTY.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy tonight, cloudy with a (30%) chance of rain Thursday (under 0.10 in. of rain possible), a slight (20%) chance of rain at night (under 0.10 in. of rain possible), rain Friday AM, showers likely (70%) Friday afternoon (0.20 in. of rain possible), mostly cloudy (40%) chance of evening showers, a slight (20%) chance of showers late Friday night (under 0.10 in. of rain possible), then partly cloudy a mix of clouds and sun with a slight (20%) chance of showers Saturday, then partly cloudy at night lows 40-45 cooling to 38 Saturday night highs 62-56 warming to near 60 Saturday. Partly cloudy Sunday and Sunday night, mostly sunny Monday, clear at night, sunny Tuesday, clear at night, then mostly sunny Wednesday highs 65-75 lows 38-42. (seasonal averages high 61 low 40)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy tonight, cloudy with a slight (20%) chance of rain Thursday and Thursday night, cloudy with a (30%) chance of rain Friday AM, showers likely (70%) in the afternoon (under 0.10 in. of rain possible), mostly cloudy with a (40%) chance of showers Friday night (under 0.10 in. of rain possible), a slight (20%) chance of showers Saturday, then just partly cloudy Saturday night lows 40-48 cooling to near 40 Saturday night highs 68-63. Partly cloudy Sunday, mostly clear at night, then mostly sunny Monday through Wednesday with clear nights highs 65-79 lows 40-48. (seasonal averages high 63 low 42)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy tonight, mostly cloudy with a slight (20%) chance of Thursday and Thursday night (under 0.10 in. of rain possible), AM coastal rain likely (70%), a (40%) chance of inland AM rain, showers likely (70%) Friday afternoon (under 0.10 in. of rain possible), a (40%) chance of showers at night (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of showers Saturday (0.10 in. of rain possible), then just mostly cloudy Saturday night lows 42-49 cooling to 42 Saturday night highs 58-54. Partly cloudy Sunday and Sunday night, mostly sunny Monday, mostly clear at night, mostly sunny Tuesday, mostly clear at night, then sunny Wednesday highs 67-70 cooling to 64 Wednesday lows 43-48. (seasonal averages high 55 low 43)
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Forecast for the Cascades of Lane County: Mostly cloudy with a slight (20%) chance of rain and snow late tonight, cloudy with a (30%) chance of rain and snow Thursday AM, a (30%) chance of rain in the afternoon (under 0.10 in. of rain possible), a slight (20%) chance of rain late Thursday night, rain Friday AM, showers in the afternoon, mostly cloudy with a good (50%) chance of showers at night and breezy (wind: W 15-25 mph decreasing to W 10-15 mph late), a slight (20%) chance of showers Saturday, then partly cloudy Saturday night snow level 4,500 ft. tonight, 4,500 ft. rising to 6,000 ft. Thursday afternoon, 6,500 ft. Thursday night and Friday, 6,000 ft. Friday night, 5,000 ft. Saturday, then free air freezing level 5,500 ft, Saturday night free air freezing level lows 27-32 cooling to 28 Saturday night highs 47-40 warming to 46 Saturday. Mostly sunny Sunday and Monday with partly cloudy skies Sunday night and clear Monday night, sunny Tuesday, clear at night, then mostly sunny Wednesday free air freezing level 7,000 ft. Sunday, 7,500 ft. at night, 8,000 ft. Sunday night, 9,000 ft. Monday, 10,000 ft. Monday night, then 11,000 ft. Tuesday through Wednesday highs 51-64 lows 32-38.
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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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