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Sorry, no winner this week.
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Here is my weekly weather quiz question for the last time. This is an easy “Fall” question. What makes the leaves lose their green color and fall off of the trees? Three factors influence autumn leaf color-leaf pigments, length of night, and weather, but not quite in the way we think. The timing of color change and leaf fall are primarily regulated by the calendar, that is, the increasing length of night. None of the other environmental influences-temperature, rainfall, food supply, and so on-are as unvarying as the steadily increasing length of night during autumn. As days grow shorter, and nights grow longer and cooler, biochemical processes in the leaf begin to paint the landscape with Nature’s autumn palette. I’ll have a new 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.
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Advisories: NONE AT THIS TIME.
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Your Saturday College Football Forecast: The Beavers vs Arizona at Reser Stadium: Kickoff 12:30 PM Partly cloudy with increasing clouds late in the afternoon, light winds, temperature near 60 warming to near 68 by the end of the game. With any luck it will stay dry until the evening when the precipitation chance returns.
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An upper air trough of low pressure (“U” shape on the orange jet stream line) is moving to the east and high pressure (“arch” shape) will help dry us out for just a bit today. A frontal system will move in along with another low pressure trough setting up along the coast bringing back more clouds and precipitation.
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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 cloudy this AM, partly cloudy this afternoon, mostly cloudy with a (30%) chance of evening rain, mostly cloudy with a good (50%) chance of rain late tonight (under 0.01 in. of rain possible) and Sunday AM, cloudy with a (30%) chance of showers Sunday afternoon, mostly cloudy with a slight (20%) chance of rain late Sunday night, cloudy with rain Monday (Columbus Day), then rain likely (60%) Monday night highs 67-60 lows 50-45. Mostly cloudy with a good (50%) chance of rain Tuesday through Thursday, then mostly cloudy with a (40%) chance of rain Thursday night and Friday highs 64-60 lows near 46. (seasonal averages high 68 low 42)
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Forecast for the Umpqua Basin including Roseburg: Partly cloudy with patchy fog this AM, partly cloudy this afternoon and evening, mostly cloudy with a slight (20%) of rain late tonight, a (30%) chance of showers Sunday AM, mostly cloudy in the afternoon, a (40%) chance of rain late Sunday night (under 0.10 in. of rain possible), cloudy with rain (under 0.10 in. of rain possible) Monday (Columbus Day), then mostly cloudy with a (40%) chance of showers Monday night highs 70-60 lows 46-50. Mostly cloudy and warmer Tuesday with a good (50%) chance of showers, mostly cloudy with a good (50%) chance of rain Tuesday night and Wednesday, a good (50%) chance of showers Wednesday night through Thursday night, then partly cloudy with a (40%) chance of showers Friday highs 70-63 lows near 50. (seasonal averages high 70 low 46)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy this AM with patchy fog, partly cloudy in the afternoon, mostly cloudy with a slight (20%) chance of evening coastal rain then rain likely (60%) late at night, mostly cloudy with a good (50%) chance of rain inland late tonight, a good (50%) chance of rain Sunday, partly cloudy with a (40%) chance of inland showers Sunday afternoon, mostly cloudy with a (30%) chance of rain late Sunday night (under 0.10 in. of rain possible), cloudy with rain (0.10 in. of rain possible) Monday (Columbus Day), then mostly cloudy with a (40%) chance of showers Monday night highs 62-58 lows 48-52. Mostly cloudy with a good (50%) chance of showers Tuesday, rain likely (60%) Tuesday night and Wednesday, then mostly cloudy with showers likely (60%) Wednesday night through Friday highs 65-58 warming to near 64 Thursday and Friday lows near 52. (seasonal averages high 62 low 47).
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Forecast for the Cascades of Lane County: Mostly cloudy with a slight (20%) chance of drizzle this AM, partly cloudy this afternoon, mostly cloudy with a (40%) chance of rain late tonight, showers likely (60%) Sunday AM, mostly cloudy with a good (50%) chance of showers Sunday afternoon (under 0.10 in. of rain possible), a slight (20%) chance of rain in the evening, a (30%) chance rain late Sunday night, cloudy with rain Monday (Columbus Day), then rain likely (60%) Monday night free air freezing level 12,000 ft. today, then snow level above 8,000 ft. tonight through Monday night highs 57-47 lows 36-39. Mostly cloudy with a good (50%) chance of rain Tuesday through Thursday, then mostly cloudy with a (40%) chance of rain Thursday night and Friday snow level above 6,500 ft. Tuesday rising to 7,000 ft. in the afternoon and Tuesday night, then above 8,000 ft. Wednesday through Friday highs 52-45 lows 36-32.
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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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