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Here is my new weekly weather quiz question. What is the difference between Doppler Radar and the older generation radar? Please post your answer as a comment after the forecasts on this page. The first person to post the correct answer will win a week of free personalized weather forecasts tailored to your needs.
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The upper air flow (yellow jet stream and dark colors for winds) shows a trough of low pressure a (“U” shape offshore) sliding Eastward into the coast as a frontal system moves in tonight into Tuesday.
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Advisories: A WINTER STORM WARNING IS IN EFFECT UNTIL 10 PM TUESDAY FOR THE NORTH OREGON CASCADES AND THE CASCADES OF LANE COUNTY. A WINTER WEATHER ADVISORY IS IN EFECT FROM 4 AM TUESDAY UNTIL 4 AM WEDNESDAY FOR THE SOUTH CENTRAL AND SOUTH CASCADES AND THE SISKIYOU MOUNTAINS OF OREGON. A WINTER STORM WATCH IS IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY AFTERNOON ABOVE 1,500 FT. FOR CENTRAL DOUGLAS COUNTY, THE EASTERN DOUGLAS COUNTY FOOTHILLS, JACKSON COUNTY, EASTERN CURRY COUNTY, AND JOSEPHINE COUNTY. A HIGH WIND WARNING IS IN EFFECT THROUGH 4 AM TUESDAY FOR THE NORTH AND CENTRAL OREGON COAST.
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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 with rain tonight (1.0 in of rain possible) and Tuesday (0.75 in. of rain possible) and Tuesday evening, showers Tuesday night (0.50 in. of rain possible), showers likely (60%) Wednesday (snow level 500 ft.-1,000 ft. 1 in. of snow possible, 0.25 in. of rain possible), showers likely (60%) Wednesday night (snow level above 500 ft.), partly cloudy with a good (50%) chance of showers Thursday, and partly cloudy Thursday night lows 42-29 highs 50-40. Mostly cloudy with a slight (20%) chance of showers Friday, partly cloudy with a slight (20%) chance of snow showers Friday night, then mostly cloudy with a slight (20%) chance of showers Saturday (New Years Day) through Monday highs 40-45 lows near 32. (seasonal averages highs 45 low 32)
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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with rain tonight through Tuesday evening, showers late at night (snow level 2,000 ft. late), rain and snow showers Wednesday and Wednesday night (snow level 1,000 ft.), mostly cloudy with rain and snow showers likely (60%) Thursday, then a slight (20%) chance of rain and snow Thursday night with patchy fog and freezing fog late lows 42-32 highs 53-40. Mostly cloudy with a slight (20%) chance of rain and snow Friday, a (40%) chance of rain and snow showers Friday night and Saturday (New Years Day), a slight (20%) chance of rain and snow Saturday night, a slight (20%) chance of rain and snow Sunday, a (30%) chance of rain and snow Sunday night, and mostly cloudy with a (40%) chance of rain Monday highs 45-40 lows near 34-29. (seasonal averages high 48 low 34)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with rain tonight and windy (wind: S 20-30 mph at the shore and S 15-25 mph inland), rain Tuesday and windy (wind: S 20-30 mph gusts to 45 mph), evening rain, then showers late Tuesday night (snow level 2,000 ft.) and breezy (wind: NW 15-25 mph gusts to 40 mph in the evening), coastal showers with rain and snow showers inland (snow level 1,000 ft.) Wednesday and Wednesday night, showers likely (60%) Thursday, then a slight (20%) chance of rain with patchy fog Thursday night lows 46-34 highs 53-46. Mostly cloudy with a good (50%) chance of rain Friday, a (40%) chance of showers Friday night and Saturday (New Years Day), then mostly cloudy with a (40%) chance of rain Saturday night, a slight (20%) chance of rain Sunday, then mostly cloudy with a (40%) chance of rain Sunday night and Monday highs near 48 lows near 38. (seasonal averages high 52 lows 39).
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Forecast for the Cascades of Lane County: Cloudy with rain or snow tonight (15-20 in. of snow possible), then rain or snow Tuesday (8-14 in. of snow possible), rain or snow Tuesday evening, showers Tuesday night (6-10 in. of snow possible), snow showers Wednesday (2-6 in. of snow possible), snow showers likely (60%) Wednesday night (1-3 in. of snow possible), snow showers likely (60%) Thursday, and a slight (20%) chance of snow showers Thursday night snow level 3,000 ft. rising to 4,500 ft. late tonight, 4,500 ft. Tuesday, falling to 3,000 ft. Tuesday evening, and 1,500 ft. late at night, at the surface Wednesday through Thursday lows 30-14 highs 35-22-27. Mostly cloudy with a slight (20%) chance of snow showers Friday, a (30%) chance of snow showers at night, mostly cloudy with a slight (20%) chance of snow showers Saturday (New Years Day), then mostly cloudy with a slight (20%) chance of snow showers Saturday night through Sunday night and a (30%) chance of snow showers Monday highs 30-34 lows 22-17.
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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.