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Attention skiers: Hoodoo, Willamette Pass, Mt. Bachelor, and Mt. Hood Meadows are all open.

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A trough of low pressure has moved in behind the weak high pressure ridge that held off the rain for Thanksgiving. It is moving across Oregon. A frontal system moved South through California bringing the  precipitation back with it particularly to the South. Another trough of low pressure will set up off shore and a frontal system will push through from the Northwest Tuesday bringing even more rain and snow with it.

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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: AM fog, mostly cloudy with a (40%) chance of showers this AM, a slight (20%) chance of afternoon showers, partly cloudy this evening, mostly cloudy with patchy fog tonight and Monday AM, just mostly cloudy in the afternoon, cloudy with a (30%) chance of rain Monday night highs 45-40 lows 27-35. Mostly cloudy with rain  and breezy Tuesday, rain Tuesday night, a good (50%) chance of rain Wednesday, rain likely (60%) Wednesday night through Friday, then mostly cloudy with a good (50%) chance of rain Friday night and Saturday highs 47-44 lows 39-35. (seasonal averages highs 48 low 36)

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Forecast for the Umpqua Basin including, Roseburg:  Cloudy with a (30%) chance of rain and snow showers today (snow level 1,000 ft. rising to 2,000 ft. in the afternoon), mostly cloudy with late night and early AM fog tonight and Monday, then mostly cloudy with a slight (20%) chance of rain Monday night, cloudy with a (40%) chance of AM rain, then rain Tuesday afternoon and night highs 40-45 lows 33-42. Mostly cloudy with rain Wednesday, rain likely (60%) Wednesday night, rain and snow showers likely (60%) Thursday through Friday, a good (50%) chance of showers Friday night, then a (50%) chance of rain and snow showers Saturday highs 44-48 lows 38-34. (seasonal averages high 52 low 38)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Mostly cloudy with a (30%) chance of showers today (snow level 2,000 ft. in the AM), mostly cloudy with late night and early AM fog tonight and Monday, mostly cloudy with a slight (20%) chance of coastal rain in the afternoon, a good (50%) chance of rain Monday night, rain Tuesday and Tuesday evening, then rain likely (60%) late Tuesday night highs 48-52 lows 35-45. Mostly cloudy with rain Wednesday and Wednesday night, showers likely (60%) Thursday through Friday, then mostly cloudy with a good (50%) chance of showers Friday night and Saturday highs from 50-46 lows 40-38. (seasonal averages high 55 lows 41).

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Forecast for the Cascades of Lane County: Cloudy with snow showers likely (60%) this AM, a good (50%) chance of snow showers this afternoon, mostly cloudy tonight,  just mostly cloudy Monday, mostly cloudy with a good (50%) chance of rain and snow Monday evening, rain and snow likely (60%) Monday night (2-5 in. of snow) , rain and snow (heavy at times) Tuesday, and rain and snow Tuesday night snow level at the surface today, free air freezing level 2,000 ft. late  tonight, 2,500 ft. rising to 3,500 ft. Monday afternoon, snow level 3,500 ft. Monday night, and 3,500 ft. rising to 4,000 ft. in the afternoon Tuesday and 3,500 ft. Tuesday night highs 24-36 lows 18-28. Mostly cloudy with  snow and rain likely (60%) Wednesday and Wednesday night, snow likely (60%) Thursday and Thursday night, mostly cloudy with a good (50%) chance of snow Friday, then snow likely (60%) Friday night and Saturday snow level 3,500 ft. Wednesday and Wednesday night, 2,500 ft. Thursday, at the surface  Thursday night,  and back to 2,500 ft. Friday through Saturday highs 34-28 and rising to 33 Saturday lows 25-20-24.

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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.