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The jet stream shows a trough of low pressure ( “U” shaped area) swinging through the Pacific Northwest with another one following behind it. A frontal system moved through the area bringing a mixture of sunshine  and wet weather. We’ll see another frontal system move in Tuesday. It’s been a long time coming, but a high pressure ridge will build in late next week into the weekend warming us up so it will feel more like Spring. It’s about time.

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Advisories:   A WINTER WEATHER ADVISORY IS IN EFFECT  FROM 10 AM UNTIL 8 PM  SUNDAY FOR THE SOUTH CENTRAL AND SOUTH OREGON CASCADES, AND THE SISKIYOU MOUNTAINS.

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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 showers likely (60%) and  isolated thunderstorms this evening (0.10 in. of rain possible, and small hail possible),  AM rain, showers and a slight (20%) chance of thunderstorms Sunday afternoon and evening (0.25 in. of rain possible, and small hail possible), a good (50%) chance of showers late Sunday night (0.10 in. of rain possible), cloudy Monday AM, a mix of clouds and sun in the afternoon with a (60%) chance of showers (0.10 in. of rain possible), rain likely (60%) Monday night(0.10 in. of rain possible), showers likely (60%) Tuesday, then a (30%) chance of showers Tuesday night lows 40-43 highs 48-57. Partly cloudy with a (40%) chance of showers Wednesday, mostly cloudy with a slight (20%) chance of showers Wednesday night, partly cloudy with a slight (20%) chance of showers Thursday, mostly cloudy with a good (50%) chance of showers Thursday night, partly cloudy with a good (50%) chance of showers Friday, then mostly cloudy with a (40%) chance of showers Friday night and Saturday highs 60-63 cooling 57 by Saturday lows near 42. (seasonal  averages high 57 low 37)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly cloudy with showers likely (60%) tonight (snow level 3,500 ft. falling to 3,000 ft. late), AM rain, showers Sunday afternoon (snow level 2,500 ft. rising to 3,000 ft. in the afternoon), showers Sunday evening and Sunday night (snow level 3,000 ft.), a good (50%) chance of showers Monday (snow level 3,000 ft.), cloudy with showers likely (60%) Monday night (snow level 3,000 ft.), showers likely (60%) Tuesday, then mostly cloudy with a slight (20%) chance of  showers Tuesday night lows 38-44 highs 52-60 cooling back to 55 Tuesday. Mostly cloudy with a slight (20%) chance of showers and warmer Wednesday, just partly cloudy Wednesday night and Thursday, mostly cloudy with a slight (20%) chance of showers Thursday night, then a (40%) chance of showers Friday through Saturday highs 62-68 cooling to near 57 Friday and Saturday lows 45-42. (seasonal averages high 61 low 39)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with showers likely (60%) this evening, showers late tonight, AM rain, afternoon showers Sunday and windy (wind: SW 20-30 mph decreasing to SW 10-20 mph late in the afternoon), showers Sunday evening, a good (50%) chance of coastal showers late Sunday night, showers likely (60%) late at night inland, showers Monday, coastal showers likely (60%) Monday night, a good (50%) chance of evening showers, then showers likely (60%) late Monday night inland, showers likely (60%) Tuesday, then a slight (20%) chance of showers Tuesday night lows 40-45 highs 48-55. Partly cloudy with a slight (20%) chance of showers Wednesday and Wednesday night, a (40%) chance of showers Thursday, then mostly cloudy with a good (50%) chance of showers Thursday night and Friday, (40%) chance of showers Friday night, then a Slight (20%) chance of showers Saturday highs 60-52 lows 45-40. (seasonal averages high 56 low 42).

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Forecast for the Cascades of Lane County: Mostly cloudy snow showers likely (60%) this evening, snow late tonight (2-5 in. of snow possible), AM snow, rain and snow showers Sunday afternoon (4-7 in. of snow possible), snow showers Sunday night (1-4 in. of snow possible), a good (50%) chance of snow showers Monday, snow and rain likely (60%) Monday night, rain and snow showers Tuesday, then a good (50%) chance of rain and snow showers Tuesday night snow level 3,000 ft. tonight, 2,500 ft. rising to 3,500 ft. Sunday, 2,500 ft. Sunday night, then 3,500 ft. Monday afternoon, 3,000 ft. Monday night, then 3,500 ft. Tuesday and Tuesday night lows 25-32 highs 34-44.  Mostly cloudy with a (30%) chance of rain and snow showers Wednesday, partly cloudy with a slight (20%) chance of showers Wednesday night, mostly cloudy with a (40%) chance of showers Thursday and Thursday night, a good (50%) chance of rain and snow showers Friday, a (40%) chance of showers Friday night, then a (40%) chance of rain and snow showers Saturday snow level 4,000 ft. Wednesday, then rising to 6,000 ft. Wednesday night through Thursday night, 4,500 ft. Friday, 5,500 ft. Friday night, then falling to 3,500 ft. Saturday highs 45-50 and back to 45 Saturday lows near 32.

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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.