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It’s time for my new weekly weather quiz question. Here it is. About 7,700 years ago Oregon’s 12,000 ft. tall Mt. Mazama erupted and its caldera collapsed. The caldera filled with water to become the second deepest (1,958 ft.) lake in North America. How long did it take to fill the caldera and form what we know as Crater Lake? I’ll have another weekly weather quiz question for you starting next Monday. 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: A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 9 AM WEDNESDAY FOR CENTRAL DOUGLAS COUNTY. A FROST ADVISORY IS IN EFFECT FROM 2 AM UNTIL 9AM WEDNESDAY FOR THE SOUTH CENTRAL OREGON COAST AND CENTRAL DOUGLAS COUNTY.
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An upper air trough of low pressure (“U” shape on yellow line) brought back the moisture as it sent a frontal system through. For the rest of the week into the weekend another low pressure area off shore and a series of frontal systems will keep the chance of precipitation around. Mountain snow levels will fall well below pass levels making for slippery roadways. A REMINDER: We will go back to Standard time NEXT WEEKEND (officially at 2 AM Sunday November 6th).
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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: Mostly clear with patchy fog late tonight and partly cloudy with patchy fog Wednesday AM, mostly cloudy with a slight (20%) chance of rain Wednesday afternoon, evening rain, showers late Wednesday night (0.25 in. of rain possible) and Thursday AM, showers with a slight (20%) chance of thunderstorms (small hail possible) in the afternoon(0.25 in. of rain possible), showers likely (60%) Thursday night, a slight (20%) chance of showers Friday, then mostly cloudy with a (30%) chance of showers Friday night lows 28-37 cooling to 33 Thursday night and back to near 35 Friday night highs 58-48. Cloudy with a good (50%) chance of rain Saturday, showers likely (60%) Saturday night and Sunday, a good (50%) chance of showers Sunday night, a (40%) chance of showers Monday, then a good (50%) chance of showers Monday night and Tuesday highs 47-50 lows near 40. (seasonal averages high 57 low 39)
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Forecast for the Umpqua Basin including Roseburg: Mostly clear with patchy fog late tonight and Wednesday AM, increasing clouds to mostly cloudy Wednesday afternoon, rain Wednesday night (0.25 in. of rain possible), showers and cooler Thursday (under 0.10 in. of rain possible), a (40%) chance of evening showers, showers likely (60%) late Thursday night, mostly cloudy with a slight (20%) chance of showers Friday, and Friday night lows 30-37 highs 57-46. Mostly cloudy with showers likely (60%) Saturday, showers Saturday night, showers likely (60%) Sunday, mostly cloudy with a good (50%) chance of showers Sunday night through Monday night, then mostly cloudy with rain likely (60%) Tuesday highs 48-53 lows near 40. (seasonal averages high 59 low 42)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly clear tonight, mostly sunny Wednesday AM, mostly cloudy in the afternoon with a slight (20%) chance of coastal rain Wednesday afternoon, rain at night (0.50 in. of rain possible), showers inland Thursday (under 0.10 in. of rain possible), coastal showers and showers Thursday night, a slight (20%) chance of showers Friday, then a (40%) chance of showers Friday night lows 34-45 cooling to 40 Friday night highs 54-50. Mostly cloudy with showers likely (60%) Saturday, showers Saturday night, showers likely (60%) Sunday, mostly cloudy with a good (50%) chance of showers Sunday night through Monday night, then mostly cloudy with rain likely (60%) Tuesday highs near 53 lows near 44. (seasonal averages high 58 low 45).
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Forecast for the Cascades of Lane County: Mostly clear tonight, mostly sunny Wednesday AM, mostly cloudy Wednesday afternoon, mostly cloudy with evening rain, rain and snow showers late Wednesday night (1-4 in. of snow possible) and Thursday AM, rain and snow showers with a slight (20%) chance of thunderstorms (small hail possible) in the afternoon, rain and snow showers likely (60%) Thursday night, a (40%) chance of rain and snow showers Friday, then mostly cloudy with a (30%) chance of rain and snow showers Friday night free air freezing level 8,000 ft. tonight, 9,000 ft. rising to 10,000 ft. Wednesday, snow level 6,500 ft. falling to 5,000 ft. late Wednesday night, 3,500 ft. Thursday, 3,000 ft. Thursday night, then 2,500 ft. Friday and Friday night lows 25-30 cooling to 23 Friday night highs 50-30. Mostly cloudy with rain and snow likely (60%) Saturday, rain and snow showers likely (60%) Saturday night and Sunday, then mostly cloudy with a good (50%) chance of rain and snow showers Sunday night through Tuesday snow level 2,500 ft. Friday and Friday night, 3,500 ft. Saturday, 4,000 ft. Saturday night, 3,500 ft. Sunday, then 4,000 ft. Sunday night through Tuesday highs 33-35 lows near 28.
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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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