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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 moved slowly away from the Pacific Northwest with colder air behind it. Notice that the jet stream airflow is set up so that it brings the colder air in from the north and northwest through New Years Day weekend.
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Advisories: A FREEZE WARNING IS IN EFFECT FROM 2 AM UNTIL 9 AM FRIDAY FOR THE SOUTH CENTRAL AND SOUTH 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 clear with areas of fog and freezing fog tonight and Friday AM, mostly sunny Friday, and mostly clear Friday night (New Years Eve), mostly sunny Saturday (New Years Day), mostly clear Saturday night, a mix of clouds and sun Sunday, partly cloudy Sunday night lows 25-30 highs near 40. A mix of clouds and sun Monday and Tuesday, partly cloudy Monday night and Tuesday night, mostly cloudy with a good (50%) chance of rain Wednesday through Thursday highs 42-48 lows 32-39. (seasonal averages highs 45 low 32)
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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with patchy fog and freezing fog tonight and Friday AM, partly cloudy Friday afternoon and evening, mostly cloudy with a slight (20%) chance of rain and snow late Friday night (New Years Eve), AM clouds, partly cloudy Saturday afternoon (New Years Day), and mostly cloudy Saturday evening, partly cloudy with patchy fog and freezing fog late Saturday night and early Sunday AM, mostly cloudy Sunday afternoon, and mostly cloudy with a slight (20%) chance of rain Sunday night lows 26-34 highs 38-46. Mostly cloudy with a slight (20%) chance of showers Monday and Monday night, just mostly cloudy Tuesday and Tuesday night, then mostly cloudy with a good (50%) chance of rain Wednesday through Thursday highs 40-46 lows near 32-38. (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 patchy fog and freezing fog late tonight and Friday AM, partly cloudy with a slight (20%) chance of coastal rain in the afternoon, a slight (20%) chance of afternoon rain and snow inland, a slight (20%) chance of a chance of rain Friday night (New Years Eve) (snow level 1,500 ft.), a slight (20%) chance of coastal rain Saturday (New Years Day), patchy coastal fog late at night, patchy fog and freezing fog late Saturday night inland, patchy AM fog and freezing fog Sunday AM, mostly cloudy in the afternoon, and a slight (20%) chance of rain Sunday night lows 30-39 highs 45-50. Mostly cloudy with a slight (20%) chance of showers Monday and Monday night, just mostly cloudy Tuesday and Tuesday night, and mostly cloudy with a good (50%) chance of rain Wednesday through Thursday highs 47-50 lows near 37-45. (seasonal averages high 52 lows 39).
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Forecast for the Cascades of Lane County: Mostly clear and colder tonight (wind chill temps to -10 in higher exposed areas), mostly sunny and breezy (wind:E 10-15 mph increasing to E 15-25 mph in the afternoon) Friday (wind chill temps to -10 in higher exposed areas), mostly clear Friday night (New Years Eve), mostly sunny Saturday (New Years Day), partly cloudy Saturday night, a mix of clouds and sun Sunday, partly cloudy with a slight (20%) chance of snow Sunday night free air freezing level at the surface tonight and Friday, 2,000 ft. Friday night through Sunday night lows 10-22 highs 24-32 . A mix of clouds and sun Monday and Tuesday, partly cloudy Monday night and Tuesday night, mostly cloudy with a good (50%) chance of rain and snow Wednesday, then rain and snow likely (60%) Wednesday night and Thursday free air freezing level 3,500 ft. Monday, 4,000 ft. Monday night, 4,500 ft. Tuesday, 4,000 ft. Tuesday night, a snow level 4,000 ft. Wednesday through Thursday highs 33-37 lows 22-30.
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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.