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Advisories: NONE AT THIS TIME.

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A high pressure ridge (“Arch” shape on yellow line) will be moving away from the Pacific Northwest with a low pressure trough (“U” shape on the yellow line) pushing in behind it. that means we will be going back to a wet weather pattern. A frontal system (shown still offshore) will approach the coast and then push in returning the clouds and chance for rain.

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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: Cloudy with rain developing late tonight (0.25 in. of rain possible), AM rain Monday, showers likely (60%) in the afternoon (0.25 in. of rain possible), partly cloudy with a good (50%) chance of  showers Monday evening, patchy fog late Monday night and Tuesday AM, partly cloudy becoming mostly cloudy with a slight (20%) chance of showers Tuesday afternoon, cloudy with a slight (20%) chance of evening rain, cloudy with a good (50%) chance of rain Tuesday night (under 0.10 in. of rain possible), rain Wednesday, then mostly cloudy with a good (50%) chance of showers Wednesday night lows 47-36 warming to near 40 Wednesday night highs 57-62 cooling to 58 Wednesday. Mostly cloudy with a good (50%) chance of showers Thursday, mostly cloudy with rain likely (60%) Thursday night and Friday, then mostly cloudy with a good (50%) chance of of rain Friday night through Sunday highs 56-60 lows 47-42. (seasonal averages high 61 low 39)

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Forecast for the Umpqua Basin including Roseburg:  Mostly cloudy with  rain tonight (0.15 in. of rain possible), rain Monday AM, showers in the afternoon (0.20 in. of rain possible), mostly cloudy with a good (50%) chance of scattered showers  in the evening (0.25 in. of rain possible), patchy fog late Monday night (under 0.10 in. of rain possible) and Tuesday AM,  a slight (20%) chance of showers Tuesday afternoon (snow level 3,500 ft.), a slight (20%) chance of showers in the evening, mostly cloudy with a good (50%) chance of rain late Tuesday night (snow level 3,500 ft.), cloudy with a good (50%) chance of AM rain, showers Wednesday afternoon, a (40%) chance of showers Wednesday night lows 48-42 warming to 45 Wednesday night highs 64-68 cooling to near 54 Sunday. Mostly cloudy with a good (50%) chance of rain Thursday, rain likely (60%) Thursday night and Friday, mostly cloudy with a good (50%) chance of showers Friday night and Saturday, mostly cloudy with a (40%) chance of rain Saturday night and Sunday highs 59-64 cooling to 57 Friday and warming to near 65 Saturday lows 43-46. (seasonal averages high 62 low 42)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Mostly cloudy with rain tonight (0.35 in. of rain possible), rain Monday AM, showers Monday afternoon (0.30 in. of rain possible), mostly cloudy with a slight (20%) chance of showers in the evening, with patchy fog late Monday night, patchy AM fog inland, a slight (20%) chance of showers  Tuesday afternoon and evening, a (40%) chance of rain late Tuesday night (under 0.10 in. of rain possible), mostly cloudy with rain likely (60%) Wednesday AM, showers in the afternoon, then showers likely (60%) Wednesday night lows 47-40 then warming to near 45 Wednesday night highs 55-52 warming to 56 Tuesday. Mostly cloudy with rain likely (60%) Thursday through Friday, a good (50%) chance of rain Friday night and Saturday, then mostly cloudy with a (40%) of rain Saturday night and Sunday highs 56-60 cooling to 56 Sunday lows near 48. (seasonal averages high 55 low 43).

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Forecast for the Cascades of Lane County: Mostly cloudy rain tonight and Monday AM, mostly cloudy with rain and snow showers Monday afternoon (0.25 in. of rain possible), evening rain and snow showers likely (60%), partly cloudy with a slight (20%) chance of rain and snow showers late Monday night ( 1 in. of snow possible, under 0.10 in. of rain possible), a mix of clouds and sun Tuesday AM, becoming mostly cloudy with a slight (20%) chance of rain and snow showers in the afternoon, mostly cloudy with a good (50%) chance of rain and snow Tuesday night, mostly cloudy with rain and snow Wednesday, then rain and snow showers likely (60%) Wednesday night snow level 6,000 ft. tonight, 7,000 ft. falling to 5,500 ft. Monday afternoon, 5,500 ft. falling to 4,500 ft. late Monday night, 4,500 ft. Tuesday, 5,000 ft. Tuesday night, 4,500 ft. Wednesday, then 5,000 ft. Wednesday night lows 36-27 warming to 33 Tuesday night then near 30 Wednesday night highs 45-42. Mostly cloudy with rain and snow showers likely (60%) Thursday, rain likely (60%) Thursday night and Friday, mostly cloudy with a good (50%) chance of rain Friday night, a mix of clouds and sun with a good (50%) chance of rain Saturday, then mostly cloudy with a good (50%) chance of rain Saturday night and Sunday snow level 5,500 ft. Thursday, above 8,000 ft. Thursday night, 8,000 ft. Friday through Saturday night, then 7,000 ft. Sunday highs 40-52 cooling to near 49 Sunday lows near 35.

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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.

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Get your local Eugene-Springfield news on-line at Eugene Daily News.com.

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