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The jet stream shows a high pressure ridge (“arch” shape) that is building into the Pacific Northwest and will warm us up a bit, so it will feel more like Spring. There a frontal system that moved North as a warm front that is moving South again as a cold front tonight. There will be a break on Friday. The next cold front will push in on its way to the Pacific Northwest Friday night and Saturday.

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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: Mostly cloudy with a good (50%) chance of showers tonight and a good (50%) chance of rain Thursday, a slight (20%) chance of evening showers, AM clouds Friday, a mix of clouds and sun in the afternoon, mostly cloudy with a slight (20%) of rain Friday evening, a good (50%) chance of rain late Friday night, rain likely (60%) Saturday, a (30%) chance of showers Saturday night lows 50-38 highs 65-50. Partly cloudy with a slight (20%) chance of showers Sunday, mostly cloudy with a slight (20%) chance of showers Sunday night, partly cloudy with a slight (20%) chance of showers Monday, mostly cloudy with a (40%) chance of showers Monday night, a (40%) chance of rain Tuesday and (30%) Tuesday night, then mostly cloudy with a (40%) chance of showers Wednesday highs near 56 lows 38-42. (seasonal  averages high 58 low 38)

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Forecast for the Umpqua Basin including, Roseburg:  Mostly cloudy with a slight (20%) chance of rain tonight, mostly cloudy Thursday AM, partly cloudy  with a slight (20%) chance of rain Thursday afternoon, just partly cloudy Thursday night, mostly cloudy Friday, a (30%) chance of showers Friday evening, showers likely (60%) late Friday night, rain likely (60%) Saturday, then a (30%) chance of rain and snow showers Saturday night lows 49-37 highs 68-53. Just mostly cloudy Sunday through Monday, mostly cloudy with a slight (20%) chance of rain Monday night, then mostly cloudy with a (40%) chance of rain Tuesday through Wednesday highs 56-63 cooling to 57 Wednesday lows near 42. (seasonal averages high 62 low 39)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with (30%) chance of rain tonight, AM clouds, partly cloudy Thursday afternoon with a slight (20%) chance of rain, mostly cloudy in the evening, partly cloudy Thursday night, mostly cloudy Friday, a (30%) chance of evening showers, showers likely (60%) late Friday night, rain likely (60%) Saturday, a (30%) chance of showers Saturday night lows 48-39 highs 60-52. Just mostly cloudy Sunday through Monday, mostly cloudy with a (40%) chance of rain Monday night and Tuesday, cloudy with a (40%) chance of rain Tuesday night, and partly cloudy with a (40%) chance of rain Wednesday highs 52-55 lows 42-45. (seasonal averages high 56 low 42).

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Forecast for the Cascades of Lane County: Mostly cloudy with showers likely (60%) tonight (0.25 in. of rain possible) and breezy (wind: SW 15-25 mph gusts to 40 mph decreasing to SW 10-15 mph late at night), a good (50%) chance of rain Thursday (0.25 in. of rain possible), a (30%) chance of showers in the evening, a slight (20%) chance of rain late Thursday night (0.25 in. of rain possible), a mix of clouds and sun Friday, a  good (50%) chance of rain and snow late Friday night, snow likely (60%) Saturday, then a (40%) chance of snow showers Saturday night snow level 8,000 ft. tonight through Thursday night, free air freezing level 8,000 ft. Friday, snow level 6,000 ft. falling to 3,500 ft. late Friday night, then 2,500 ft. Saturday and Saturday night lows 37-22 highs 56-35. Partly cloudy with a (20%) chance of rain and snow showers Sunday, mostly cloudy with a slight (20%) chance of rain and snow showers Sunday night, a slight (20%) chance of showers Monday, a good (50%) chance of showers Monday night, mostly cloudy with a (40%) chance of rain Tuesday and Tuesday night, then a good (50%) chance of rain and snow showers Wednesday snow level 3,500 ft. Sunday and Sunday night, 4,500 ft. Monday, rising to 6,500 ft. Monday night, 6,000 ft. Tuesday, 5,000 ft. Tuesday night, and 4,000 ft. Wednesday highs 42-52 cooling to 43 by Wednesday lows 22-32.

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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.