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Advisories: NONE AT THIS TIME.
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Another upper air trough of low pressure (“U” shape on the orange jet stream line) is moving toward the Pacific Northwest setting us up for a wet week with a possible break about midweek. A frontal system has faded as it moved into Oregon, but still brought some rain with it.
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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 slight (20%) chance of rain late tonight, rain (0.50 in. of rain possible) Monday (Columbus Day), rain Monday night (0.10 in. of rain possible) and Tuesday, mostly cloudy with a good (50%) chance of rain Tuesday night, mostly cloudy with a slight (20%) chance of rain Wednesday, then just mostly cloudy Wednesday night lows 46-52 cooling to 44 Wednesday night highs 62-65. A mix of clouds and sun Thursday, mostly cloudy with a slight (20%) chance of showers Thursday night, a (40%) chance of rain Friday, a good (50%) chance of rain Friday night and Saturday, a (30%) chance of rain Saturday night, then mostly cloudy with a (40%) chance of rain Sunday highs 68-60 lows near 45. (seasonal averages high 68 low 42)
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Forecast for the Umpqua Basin including Roseburg: Mostly cloudy with a good (50%) chance of rain late tonight (under 0.10 in. of rain possible), cloudy with rain Monday AM (Columbus Day), showers and a slight (20%) chance of thunderstorms in the afternoon (0.50 in. of rain possible, more in storms), showers Monday night (under 0.10 in. of rain possible), showers likely (60%) Tuesday AM, rain likely (60%) Tuesday afternoon (under 0.10 in. of rain possible), mostly cloudy with a (30%) chance of rain Tuesday night, then mostly cloudy with a slight (20%) chance of showers Wednesday and Wednesday night lows 50-47 highs 67-60. Mostly cloudy with a slight (20%) chance of showers Thursday and Thursday night, a (40%) chance of rain Friday and Friday night (colder), mostly cloudy with a (40%) chance of showers Saturday and Saturday night, then mostly cloudy with a slight (20%) chance of showers Sunday highs 72-65 lows 47-43. (seasonal averages high 70 low 46)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with rain likely (60%) tonight (0.10 in. of rain possible), cloudy with rain (0.25 in. of rain possible) Monday AM (Columbus Day) and breezy (wind: SE 5-10 mph increasing to SW 15-25 mph late AM and afternoon), showers and a slight (20%) chance of thunderstorms in the afternoon (0.75 in. of rain possible), scattered evening coastal showers then showers likely (60%) late at night, showers inland Monday night (under 0.10 in. of rain possible), showers likely (60%) Tuesday AM, rain likely (60%) in the afternoon (0.10 in. of rain possible), mostly cloudy with a (40%) chance of rain Tuesday night, then mostly cloudy with a slight (20%) chance of rain Wednesday and Wednesday night lows 54-48 warming to 53 Wednesday highs 58-65. Mostly cloudy Thursday, mostly cloudy with a slight (20%) chance of showers Thursday night, a good (50%) chance of rain and cooler Friday, cloudy with a good (50%) of rain Friday night, mostly cloudy with a good (50%) chance of showers Saturday and Saturday night, then mostly cloudy with a slight (20%) chance of showers Sunday highs 60-67 lows 48-45. (seasonal averages high 62 low 47).
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Forecast for the Cascades of Lane County: Mostly cloudy with a slight (20%) chance of rain late tonight, cloudy with rain (0.50 in. of rain possible) and breezy (wind: SW 10-20 mph with gusts to 40 mph in the AM) Monday (Columbus Day), rain and breezy (wind: SW 20-25 mph gusts to 40 mph decreasing to SW 5-15 mph gusts to 30 mph late at night) Monday night (0.25 in. of rain possible), rain and breezy (wind: SW10-20 mph gusts to 35 mph) Tuesday, a good (50%) chance of showers Tuesday night, a slight (20%) chance of rain Wednesday, then just mostly cloudy Wednesday night snow level above 8,000 ft. tonight and Monday, 8,000 ft. Monday night, 6,500 ft. Tuesday and Tuesday night, above 8,000 ft. Wednesday, then free air freezing level 11,000 ft. Wednesday night lows 38-35 highs 49-46 warming to 53 Wednesday. A mix of clouds and sun Thursday, partly cloudy with a slight (20%) chance of showers Thursday night, a mix of clouds and sun with a good (50%) chance of rain Friday, mostly cloudy with a good (50%) chance of rain Friday night and Saturday, then mostly cloudy with a (40%) chance of rain Saturday night and Sunday free air freezing level 11,000 ft. Thursday, snow level above 8,000 ft. Thursday night through Friday night, 6,000 ft. Saturday, then 5,500 ft. Saturday night and Sunday highs 57-44 lows near 34.
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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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