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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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Another upper level trough of low pressure (shaded “U” shape) is moving through the Pacific Northwest and pulling away from us to the east. A weak frontal system will bring a few showers Friday into Saturday and then the dry weather, except for a slight chance of showers, begins. A high pressure ridge (“Arch” shape shaded and with blue arrows) is falling in behind the low and will dry us out and show us that illusive bright orb called the sun. It won’t be until the middle to the end of next week that a frontal system will move through adding to the clouds and rainy weather.
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Advisories: NONE AT THIS TIME.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy with patchy fog late tonight and Friday AM, mostly cloudy with a slight (20%) chance of rain in the afternoon (0.15 in. of rain possible), mostly cloudy with a slight (20%) chance of rain Friday night (0.30 in. of rain possible) with patchy fog late at night and early Saturday AM, mostly cloudy with a slight (20%) in the afternoon and evening, mostly cloudy with patchy fog late Saturday night and Sunday AM, partly cloudy in the afternoon, mostly cloudy with patchy fog late Sunday night lows 33-30 highs near 40. Patchy AM fog, a mix of clouds and sun with a slight (20%) chance of rain Monday afternoon, partly cloudy with a slight (20%) chance of rain at night, a mix of clouds and sun with a slight (20%) chance of rain Tuesday (New Year’s Day), a slight (20%) chance of rain Tuesday night, a mix of clouds and sun with a slight (20%) chance of rain Wednesday, then mostly cloudy with a (30%) chance of rain Wednesday night and Thursday highs 40-45 lows 32-36. (seasonal averages high 45 low 33)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with areas of fog late tonight and Friday AM, mostly cloudy with a (30%) chance of rain and snow Friday afternoon (under 0.10 in. of rain possible, snow level 2,000 ft.) and Friday night (under 0.10 in. of rain possible, snow level 3,000 ft.), just mostly cloudy Saturday with a slight (20%) chance of AM rain and snow showers, mostly cloudy Saturday night and Sunday AM with patchy AM freezing fog, then partly cloudy Sunday night lows near 34 highs near 46. Mostly cloudy with a (30%) chance of rain Monday, mostly cloudy Monday night, mostly cloudy with a slight (20%) chance of rain Tuesday (New Year’s Day), partly cloudy with a slight (20%) chance of rain Tuesday night, then mostly cloudy with a slight (20%) chance of rain Wednesday through Thursday highs 44-50 lows 34-38. (seasonal averages high 48 low 36)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with areas of patchy fog late tonight, cloudy with a (30%) chance of rain Friday (0.10 in. of rain possible), a (40%) chance of rain Friday night (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of coastal showers Saturday with a slight (20%) chance of AM showers inland, mostly cloudy with patchy fog late Saturday night and Sunday AM, mostly cloudy in the afternoon, then partly cloudy Sunday night lows 38-34 highs near 48. Mostly cloudy with a (30%) chance of rain Monday, mostly cloudy Monday night, mostly cloudy with a slight (20%) chance of rain Tuesday (New Year’s Day), mostly cloudy with a slight (20%) chance of rain Tuesday night and Wednesday, a (30%) chance of rain Wednesday night, then mostly cloudy with a slight (20%) chance of rain Thursday highs 46-52 lows 38-40. (seasonal averages high 51 low 40)
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Forecast for the Cascades of Lane County: Partly cloudy tonight, mostly cloudy with a slight (20%) chance of snow Friday afternoon and evening, a (30%) chance of snow Friday night, mostly cloudy with a slight (20%) chance of snow showers Saturday and Saturday night, a mix of clouds and sun Sunday, then mostly cloudy Sunday night free air freezing level at the surface tonight and Friday AM, snow level 2,500 ft. Friday night, snow level at the surface Saturday and Saturday night, free air freezing level at the surface Sunday, then 2,500 ft. Sunday night lows 20-25 cooling to 22 Sunday night highs near 30. A mix of clouds and sun Monday with a slight (20%) chance of AM rain and snow, a (40%) chance of rain in the afternoon, a slight (20%) chance of rain and snow Monday night, a mix of clouds and sun with a slight (20%) chance of rain Tuesday (New Year’s Day), a slight (20%) chance of rain and snow Tuesday night, a mix of clouds and sun with a slight (20%) chance of rain and snow Wednesday, then mostly cloudy with a (30%) chance of rain and snow Wednesday night and Thursday snow level 3,500 ft. Monday, 3,000 ft. Monday night, 3,500 ft. Tuesday, 4,500 ft. Tuesday night, and Wednesday, then 4,000 ft. Wednesday night and Thursday highs 30-32 lows 22-26.
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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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