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Advisories: NONE AT THIS TIME.
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An upper air trough of low pressure (“U” shape on the orange jet stream line) is sending even more moist cooler air our way. One frontal system came through already and a second even stronger one (shown offshore) will sweep into Oregon overnight dropping more rain on us.
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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 a good (50%) chance of showers this evening, rain late tonight (0.25 in. of rain possible) and Monday (0.25 in. of rain possible), showers likely (60%) Monday night (0.10 in. of rain possible), cloudy with a good (50%) chance of showers Tuesday AM, a good (50%) chance of rain in the afternoon, rain Tuesday night, showers with a slight (20%) chance of thunderstorms Wednesday afternoon, then showers likely (60%) Wednesday night lows 52-42 highs 64-57. Mostly cloudy with a (30%) chance of showers Thursday, a slight (20%) chance of showers Thursday night, a (30%) chance of showers Friday, mostly cloudy with a slight (20%) chance of showers Friday night, partly cloudy with a slight (20%) chance of showers Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night, then mostly cloudy with a (40%) chance of showers Sunday highs 60-66 lows 44-47. (seasonal averages high 71 low 44)
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Forecast for the Umpqua Basin including Roseburg: Cloudy with a (40%) chance of rain this evening, mostly cloudy with showers Monday, cloudy with a good (50%) chance of showers Monday night, mostly cloudy with a good (50%) chance of showers Tuesday AM, showers likely (60%) in the afternoon, rain Tuesday night, showers and isolated thunderstorms Wednesday, then a (30%) chance of showers Wednesday night lows 52-45 highs 65-60. Mostly cloudy with a slight (20%) chance of showers Thursday through Saturday, then mostly cloudy with a (40%) chance of showers Saturday night and Sunday highs 63-70 lows 44-49. (seasonal averages high 73 low 48)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with rain and breezy tonight (wind: S 20-30 mph at the beaches, S 10-20 mph inland tonight, possible gusts to 45 ph this evening), showers Monday AM, showers likely (60%) Monday afternoon with a slight (20%) chance of coastal thunderstorms, a good (50%) chance of coastal evening showers and showers likely (60%) late at night, a good (50%) chance of showers inland Monday night, a (40%) chance of showers Tuesday AM, showers in the afternoon and breezy (wind: S 5-10 mph increasing to S 20-25 mph with gusts to 40 mph in the afternoon), evening coastal rain then rain and isolated thunderstorms late Tuesday night, rain inland Tuesday night and windy (wind: inland S 20-25 mph then SW 10-15 mph late at night, at the shore wind: S 25-35 mph then SW 15 mph late), showers and isolated thunderstorms Wednesday, then mostly cloudy with a good (50%) chance of showers Wednesday night lows 53-47 highs 58-62. Mostly cloudy with a slight (20%) chance of showers Thursday through Saturday, then mostly cloudy with a good (50%) chance of showers Saturday night and Sunday highs 59-64 lows 46-50. (seasonal averages high 63 low 48).
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Forecast for the Cascades of Lane County: Cloudy with showers likely (60%) this evening, rain likely (60%) late tonight (0.10 in. of rain possible), mostly cloudy with rain Monday (0.25 in. of rain possible), showers Monday night (0.25 in. of rain possible), showers likely (60%) Tuesday AM, a good (50%) chance of showers in the afternoon, rain Tuesday night, showers Wednesday with a slight (20%) chance of afternoon thunderstorms, then rain and snow showers likely (60%) Wednesday night snow level 8,000 ft. falling to 7,000 ft. late tonight and again Monday afternoon, 7,000 ft. falling to 6,000 ft. Monday night, 5,000 ft. rising to 6,000 ft. Tuesday afternoon, 6,500 ft. falling to 5,500 ft. Tuesday night, then 4,500 ft. Wednesday and Wednesday night lows 42-33 highs 52-42. Mostly cloudy with a (30%) chance of showers Thursday through Friday night, partly cloudy with a slight (20%) chance of showers Saturday, mostly cloudy with a (30%) chance of showers Saturday night, then mostly cloudy with a (40%) chance of showers Sunday snow level 4,500 ft. rising to 6,000 ft. Thursday, 7,000 ft. Thursday night and Friday, then above 8,000 ft. Friday night through Sunday highs 52-58 lows 35-40.
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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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