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Here is my weekly weather quiz question. What is the “green sky” effect? Please 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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Upper level low pressure (“U” shape offshore coming out of the Gulf of Alaska) is following behind another low that is moving away from us will be controlling our weather for the next couple of days but as it moves the slight chance of showers will disappear. A frontal system moved through Oregon spreading more clouds over the area and producing some showers, particularly in Eastern Oregon. Weak high pressure will be sandwiched between those lows. Look for more sunshine and warmer temperatures returning late in the week. There will be another weak frontal system pushing through Oregon, but this one should be dry for the most part and only lower the temperatures a bit. The drying trend will last through the weekend and into early next week.
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Advisories: A FROST ADVISORY IS IN EFFECT FROM 2 AM UNTIL 8 AM THURSDAY FOR THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL, AND EASTERN LAKE COUNTY.
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Here are your detailed forecasts. **
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Partly cloudy tonight, AM clouds, a mix of clouds and sun and warmer Thursday, partly cloudy in the evening, mostly Thursday night and Friday AM with a slight (20%) chance of drizzle Friday AM, a mix of clouds and sun in the afternoon, partly cloudy in the evening, mostly cloudy Friday night and Saturday AM, a mix of clouds and sun in the afternoon, partly cloudy in the evening, then mostly cloudy Saturday night lows 42-50 cooling to 44 Saturday night highs 76-70. AM clouds, then a mix of clouds and sun Sunday, Monday, Tuesday, and Wednesday, just partly cloudy each night highs near 70 lows 44-48. (seasonal averages high 71 low 46)
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Forecast for the Umpqua Basin including Roseburg: Partly cloudy this evening, mostly cloudy tonight and Thursday AM, mostly sunny Thursday afternoon, partly cloudy in the evening, mostly cloudy late Thursday night and Friday AM, partly cloudy in the afternoon, mostly cloudy Friday night through Saturday night lows 46-49 highs 75-70. Mostly cloudy Sunday through Monday, then partly cloudy Monday night through Wednesday highs near 77 lows near 50. (seasonal averages high 76 low 49)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening, mostly cloudy tonight with patchy coastal fog late tonight and Thursday AM, partly cloudy Thursday afternoon and evening, mostly cloudy Thursday night with patchy coastal fog late at night and early Friday AM, partly cloudy in the afternoon, mostly cloudy Friday night with patchy fog late at night and early Saturday AM, mostly cloudy Saturday afternoon and Saturday night lows near 48 highs 64-59. Mostly cloudy Sunday through Monday, then partly cloudy Monday through Wednesday highs 62-65 lows 46-49. (seasonal averages high 63 low 50).
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Forecast for the Cascades of Lane County: Partly cloudy with a slight chance of showers this evening, partly cloudy tonight, a mix of clouds and sun Thursday, partly cloudy with a slight (20%) chance of showers late Thursday night, mostly cloudy Friday AM, a mix of clouds and sun in the afternoon, partly cloudy in the evening, then mostly cloudy late Friday night and Saturday AM, a mix of clouds and sun Saturday afternoon, then partly cloudy Saturday night snow level 7,000 ft. tonight, free air freezing level 10,000 ft. rising to 11,000 ft. Thursday, snow level above 8,000 ft. Thursday night, 8,000 ft. Friday, free air freezing level 9,000 ft. Friday night and Saturday, then 10,000 ft. Saturday night lows 35-42 cooling to 38 Saturday night highs near 60. A mix of clouds and sun Sunday through Monday, partly cloudy each night, then partly cloudy Tuesday free air freezing level 9,000 ft. Saturday, 10,000 ft. Saturday night, above 8,000 ft. Sunday and Sunday night, 12,000 ft. Monday, 10,000 ft. Monday night, rising to 13,000 ft. Tuesday, 15,000 ft. Tuesday night, then 12,000 ft. Wednesday highs near 60 lows near 40.
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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 EugeneDailyNews.com.
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