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This is your last chance to win this year. 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) sliding Eastward through Oregon and a low (yellow circle) developing and moving through California as a frontal system moved slowly away from the Pacific Northwest with colder air behind it. The next frontal system offshore will side to the South with little effect on the area. Only the far Southern reaches of the state might see some precipitation. Notice that the jet stream airflow has set up a high pressure ridge (“Arch” shape on yellow line) that it brings mostly clear skies and the colder air in from the north and northwest through New Years Day Holiday weekend.

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Advisories:  NONE AT THIS TIME.

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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:  Partly cloudy with patchy fog and freezing fog again late tonight (New Years Eve) and early Saturday AM, a mix of clouds and sun Saturday (New Years Day), partly cloudy Saturday night with patchy fog and freezing fog again late night and early Sunday AM, mostly sunny Sunday, partly cloudy Sunday night, a mix of clouds and sun Monday and Tuesday (patchy AM fog Tuesday), partly cloudy Monday night and Tuesday night (patchy fog again late Tuesday night) lows 24-30 highs 38-45. Mostly cloudy with a good (50%) chance of rain Wednesday through Thursday night, and rain likely (60%) Friday highs 44-48 lows 36-43. (seasonal averages highs 45 low 32)

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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with a good (50%) chance of rain and snow (snow level 2,000 ft. falling to 1,500 ft late) late tonight (New Years Eve),  a slight (20%) chance of rain Saturday AM (snow level 2,000 ft.),  just mostly cloudy Saturday (New Years Day) afternoon and night, mostly cloudy Sunday AM, and partly cloudy in the afternoon and Sunday night with areas of fog and freezing fog late at night and early Monday AM, patchy fog in the afternoon and evening, areas of fog and freezing fog late Monday night and early Tuesday AM, then just mostly cloudy Tuesday afternoon and night lows 30-32 highs 44-48. Mostly cloudy with a good (50%) chance of rain Wednesday through Friday highs 45-53 lows near 36-40. (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 a (20%) chance of a chance of rain this evening, rain likely (60%) tonight (New Years Eve) (snow level 2,000 ft.), a (40%) chance of  rain (snow level 2,000 ft. in the AM) Saturday (New Years Day), mostly cloudy Saturday night and Sunday AM, partly cloudy in the afternoon and evening, mostly cloudy with areas of fog Sunday night and Monday AM, mostly cloudy with patchy fog Monday afternoon and evening, areas of fog again late Monday night lows 35-32 highs 47-50. Mostly cloudy with areas of patchy fog Tuesday AM, partly cloudy in the afternoon and evening, then mostly cloudy Tuesday night, mostly cloudy with a (40%) chance of rain Wednesday, a good (50%) chance of rain Wednesday night and Thursday, then rain likely (60%) Thursday night and Friday highs 47-52 lows near 35-43. (seasonal averages high 52 lows 39).

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Forecast for the Cascades of Lane County: Partly cloudy with a slight (20%) chance of snow, mainly South, tonight (New Years Eve), a mix of clouds and sun Saturday (New Years Day) with a slight (20%) chance of snow, South, early AM, partly cloudy Saturday night, a mix of clouds and sun Sunday, Monday, and Tuesday, partly cloudy each night snow level at the surface tonight and Saturday AM, free air freezing level at the surface Saturday afternoon and Saturday night, 3,000 ft. Sunday, 2,500 ft. Sunday night, 3,500 ft. Monday and Monday night, 4,500 ft, Tuesday, and 4,000 ft. Tuesday night lows 14-26 highs 29-35. Mostly cloudy with a good (50%) chance of rain and snow Wednesday, rain and snow likely (60%) Wednesday night and Thursday, a good (50%) chance Thursday night,  and rain and snow likely (60%) Friday  snow level  4,000 ft. Wednesday through Thursday, 3,500 ft. Thursday night, and rising to 5,000 ft. Friday highs 37-34 lows near 28.

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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.