The upper airflow (look at the little arrows along the coast) is curving from the southwest bringing warmer more moist air into Oregon. A frontal system is pushing into northern California (see last frame of animation). It is spreading moisture northward over us.  Freezing rain and sleet are falling in the area because of that warm moist rolling over the cold air mass that is still over us.As the cold air at the surface is cleared out it will be replaced by the warmer moist air. Next week will be warmer and become very wet because of a fetch of subtropical moisture headed our way.

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Advisories: A WINTER WEATHER ADVISORY IS IN EFFECT  UNTIL 10 PM TONIGHT FOR THE PORTLAND AREA AND UNTIL 6 AM SUNDAY FOR THE COLUMBIA RIVER GORGE AREA AND THE UPPER HOOD RIVER VALLEY. A WINTER WEATHER ADVISORY IS IN EFFECT  UNTIL 6 PM TONIGHT FOR THE SALEM AREA. ALL OTHER ADVISORIES HAVE BEEN CANCELLED.

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For the Willamette Valley: Look for rain overnight tonight low 29-32. Sunday will be warmer with a good (50%) chance of showers high 40-43. Mostly cloudy with a  (40%) chance of showers Sunday night lows 30-32. Mostly cloudy with a (30%) chance of rain Monday high 43-46. Rain Monday night and Tuesday low 38-40 high 47-49. Rain will be likely (60%) Wednesday through Saturday highs warming to near 59  lows 40-45.

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For the Umpqua Basin: Showers tonight low 34-37. AM showers likely (60%) Sunday then rain and snow showers likely (60%) in the afternoon, snow level 3,000’falling to 1,500′ (up to 1″ of snow possible) high 42-44, There will be a (40%) chance of rain and snow showers at night snow level rising to 2,500′ low 28-30.There will be a (80%) chance of rain and snow showers  Monday morning then a (80%) chance of rain in the afternoon snow level rising to 3,500′ high in the low to mid 40s. Rain Monday night low 36. Rain Tuesday high 44. Rain will be likely (60%) Tuesday night through Wednesday night lows 35-38 highs 43-45. Cloudy with a (50-60%) chance of rain Thursday through Friday night highs mid to upper 40s lows near 40 . Rain will be likely (60%) Saturday high near 50.

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Forecast for the South Coast: Showers likely (60%) tonight low 37-40. Showers likely (60%) Sunday with a snow level of 2,000′ in the afternoon, Sunday night a (40%) chance of  showers, high 42-46 low near 33-36. Rain (60-80%) Monday through Saturday highs warming to the low to mid 50s lows in the low to mid 40s.

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For the Cascades: Tonight snow and rain(1-3″ of snow) snow level 3,000′. Sunday snow showers likely (60%), snow level 2,500′ (1-3″ of snow) . Snow and rain Monday through Tuesday the snow level rising from  3,000′-5,000′. Tuesday’s snow level will be 5,000′, Tuesday night 4,500′, Wednesday 6,500′, and Wednesday night 5,500′. Thursday through Saturday the snow levels will rise and stay above pass levels.