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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. A high pressure ridge (“Arch” shape shaded and with blue arrows) will fall in behind the low and dry us out and show us that illusive bright orb called the sun by the end of the week. It won’t be until the middle of next week that a frontal system could bring back the cloudy and rainy weather.
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Advisories:
A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 AM THURSDAY FOR THE NORTH OREGON CASCADES AND THE CASCADES IN LANE COUNTY, AND UNTIL 4 AM THURSDAY ABOVE 2,000 FT. FOR CENTRAL DOUGLAS COUNTY, EASTERN CURRY COUNTY, JOSEPHINE COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, AND JACKSON COUNTY.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly cloudy with showers tonight (0.15 in. of rain possible), mostly cloudy with a (40%) chance of AM showers, a slight (20%) chance of showers (under 0.10 in. of rain possible) Thursday afternoon, mostly cloudy with patchy fog late Thursday night, Friday AM fog, mostly cloudy in the afternoon (0.15 in. of rain possible), mostly cloudy with a slight (20%) chance of showers Friday night (0.30 in. of rain possible), then just mostly cloudy Saturday and Saturday night lows near 34 highs 42-39. Partly cloudy Sunday, mostly cloudy at night, a mix of clouds and sun Monday, mostly cloudy with a slight (20%) chance of with a slight (20%) chance of rain Monday night and Tuesday (New Year’s Day), a (40%) chance of rain Tuesday night, then mostly cloudy with a (30%) chance of rain Wednesday highs 40-44 lows 33-36. (seasonal averages high 45 low 33)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with rain and snow showers this evening, rain and snow showers likely (70%) late tonight (0.10 in. of rain possible, 1-2 in. of snow possible, snow level 2,000 ft. falling to 1,500 ft. late), mostly cloudy with a (30%) chance of rain and snow showers Thursday (under 0.10 in. of rain possible, snow level 2,000 ft.), mostly cloudy with areas of fog Thursday night, mostly cloudy with a slight (20%) chance of rain and snow Friday afternoon (under 0.10 in. of rain possible), mostly cloudy with a slight (20%) chance of rain and snow showers Friday night (0.10 in. of rain possible, snow level 2,500 ft.), then just mostly cloudy Saturday and Saturday night lows 37-32 highs 47-40. Partly cloudy Sunday and Sunday night, mostly cloudy Monday, partly cloudy with a slight (20%) chance of rain Monday night and Tuesday (New Year’s Day), then mostly cloudy with a slight (20%) chance of rain Tuesday night and Wednesday highs 42-46 lows 32-36. (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 coastal showers tonight while evening showers then showers likely (60%) inland late (0.15 in. of rain possible, snow level 2,000 ft.), mostly cloudy with a (30%) chance of showers Thursday (under 0.10 in. of rain possible, snow level 2,000 ft.), mostly cloudy with patchy fog late Thursday night, cloudy with a slight (20%) chance of rain Friday (0.10 in. of rain possible), a (30%) chance of rain Friday night (0.30 in. of rain possible), then just mostly cloudy Saturday and Saturday night lows 39-34 highs 48-46. Partly cloudy Sunday, mostly cloudy Sunday night and Monday, mostly cloudy with a slight (20%) chance of rain Monday night and Tuesday (New Year’s Day), then mostly cloudy with a (30%) chance of rain Tuesday night and Wednesday highs 46-52 lows 36-40. (seasonal averages high 51 low 40)
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Forecast for the Cascades of Lane County: Mostly cloudy with snow showers tonight (0.15 in. of rain possible, 4-8 in. of snow possible), AM snow showers likely (60%), a (40%) chance of snow showers Thursday afternoon (1 in. of snow possible), partly cloudy Thursday night, mostly cloudy Friday, mostly cloudy with a slight (20%) chance of snow Friday night, then mostly cloudy with a slight (20%) chance of snow showers Saturday and Saturday night snow level at the surface tonight and Thursday, free air freezing level at the surface Thursday night and Friday, snow level 3,500 ft. Friday night, then at the surface Saturday and Saturday night lows 22-25 cooling to 22 Saturday night highs near 30. A mix of clouds and sun Sunday, mostly cloudy Sunday night, a mix of clouds and sun Monday, mostly cloudy at night, then mostly cloudy with a slight (20%) chance of rain and snow Tuesday (New Year’s Day), then mostly cloudy with a (30%) chance of rain and snow Tuesday night and Wednesday free air freezing level at the surface Sunday and Sunday night, 4,500 ft. Monday, 6,000 ft. Monday night, snow level 6,000 ft. Tuesday and Tuesday night, then 5,500 ft. Wednesday highs near 30 lows 25-22 warming to 26 Tuesday night.
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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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