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An upper level trough of low pressure (“U” shaped shaded area) is moving Eastward away from us with high pressure taking its place until Monday. Then another trough of low pressure will slide in along the coast sending more a=storms our way. A complex frontal system will push into Oregon Wednesday.

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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 (30%) chance rain or drizzle this evening,  a slight (20%) chance of rain or drizzle tonight and Monday AM, rain likely (60%) Monday, mostly cloudy with a (30%) chance of evening rain, then a (40%) chance of showers Monday night, patchy AM fog and clouds Tuesday AM, a mix of clouds and sun Tuesday afternoon, then partly cloudy and colder with patchy fog Tuesday night lows 48-36 highs 56-52. AM fog, then mostly cloudy with a slight (20%) chance of rain Wednesday afternoon, rain likely (60%) Wednesday night and Thursday, mostly cloudy with showers likely (60%) Thursday night, then a good (50%) chance of showers Friday through Sunday highs 52-42 lows 40-36. (seasonal averages highs 52 low 38)

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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with a slight (20%) chance of  rain tonight with fog late and early Monday AM, a slight (20%) chance of rain in the afternoon, a (30%) chance of rain Monday night, AM fog and mostly cloudy early Tuesday with a slight (20%) chance of rain, partly cloudy Tuesday afternoon and evening, mostly cloudy with areas of fog at night lows 48-38 highs 56-52. AM fog and mostly cloudy with a slight (20%) chance of rain Wednesday afternoon, mostly cloudy with a good (50%) chance of evening rain, rain likely (60%) late Wednesday night, mostly cloudy with rain Thursday, rain likely (60%) in the evening, rain and snow likely (60%) late Thursday night, showers likely (60%) Friday,  rain and snow showers likely (60%) Friday night through Saturday night, then mostly cloudy with a (40%) chance of rain and snow showers Sunday highs 54-44 lows 42-34. (seasonal averages high 56 low 40)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy tonight with a slight (20%) chance of rain at the beaches and a slight (20%) chance of rain inland this evening, fog late tonight and Monday AM, mostly cloudy with a slight (20%) chance of rain in the afternoon, a (30%) chance of rain Monday night, AM fog then mostly cloudy Tuesday, and partly cloudy Tuesday evening, mostly cloudy at night with more fog late lows 48-40 highs 56-54. AM clouds and fog, mostly cloudy Wednesday, a slight (20%) chance of rain in the afternoon, a good (50%) chance Wednesday evening, rain and breezy, rain Thursday, rain likely (60%) Thursday night, showers likely (60%) Friday through Saturday night, then mostly cloudy with a good (50%) chance of showers Sunday highs 54-48 lows 44-40. (seasonal averages high 57 lows 43).

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Forecast for the Cascades of Lane County:  Mostly cloudy with rain or drizzle likely (60%) tonight mainly North,  a (40%) chance of rain or drizzle Monday AM, rain in the afternoon mainly to the North (0.25″ of rain possible), rain in the evening, showers likely (60%) and breezy late Monday night (1 in. of snow possible, 0.25 in. of rain possible), a (30%) chance of rain and snow showers Tuesday, and partly cloudy with a slight (20%) chance of showers Tuesday evening snow level above 8,000 ft. tonight and Monday, 7,000 ft. falling to 6,000 ft. Monday night, then 5,000 ft. Tuesday and Tuesday night lows 35-26 highs 42-38. Mostly cloudy with rain and snow likely (60%) Wednesday afternoon mainly North, mostly cloudy with rain and snow likely (60%) Wednesday night and Thursday, a good (50%) chance of snow Thursday night, snow showers likely (60%) Friday, then mostly cloudy with a good (50%) chance of snow showers Friday night and Saturday, snow showers likely (60%) Saturday night, and mostly cloudy with a (50%) chance of snow showers Sunday snow level 4,500 ft. Wednesday and Wednesday night,  4,000 ft. Thursday, 3,000 ft. Thursday night and Friday, 2,500 ft. Friday night, and 3,000 ft. Saturday, and 2,500 ct. Saturday night and Sunday highs 43-28 lows 29-23.

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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.