A  high pressure ridge (shaded “Arch” shape over the Pacific and the Northwest) is moving away from us. Low pressure is falling in behind the ridge bringing back cooler rainy weather. A frontal system has brought the rain back. Another cold front is moving in today. Look for a stronger frontal system to roll across Oregon on Thursday bringing an even better chance of precipitation back.

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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: Cloudy with rain this AM, showers likely (60%) and cooler in the afternoon, mostly cloudy in the evening, partly cloudy and cooler with patchy fog tonight and Monday AM, a mix of clouds and sun Monday afternoon (Columbus Day), mostly clear in the evening, then mostly cloudy with patchy fog late at night highs 63-60 lows 54-39. Patchy AM and late night fog or low clouds Tuesday and Wednesday, mostly cloudy both nights, partly cloudy with a slight (20%) chance of showers Thursday, mostly cloudy with a (30%) chance of rain at night, then a slight (20%) chance of rain Thursday night through Saturday highs 65-70 cooling to 58 Thursday, warming to 63 Saturday lows 40-47, cooling to near 40 Friday night. (seasonal averages highs 67 low 41)

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Forecast for the Umpqua Basin including, Roseburg:  Cloudy with rain this AM,  showers in the afternoon, a (30%) chance of showers this evening, patchy fog late at night and Monday AM, sunny Monday afternoon (Columbus Day) and Tuesday, mostly clear Monday evening then partly cloudy with patchy fog late at night, mostly clear Tuesday night highs 63-69 lows 53-39. Mostly sunny Wednesday, partly cloudy Wednesday night, mostly cloudy with a slight (20%) chance of rain Thursday, a (30%) chance of  showers Thursday night, mostly cloudy with a slight (20%) chance of showers Friday, just mostly cloudy Friday night, and mostly cloudy with a slight (20%) chance of showers Saturday highs 70-57 lows 50-42. (seasonal averages high 72 low 45)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Cloudy with rain this AM rain, coastal showers likely (60%) in the afternoon, afternoon showers inland, mostly cloudy with a slight chance of showers this evening  high near 60 lows 52-47. Sunny Monday (Columbus Day) with patchy AM coastal fog, mostly clear in the evening,  partly cloudy with patchy fog late Monday night and Tuesday AM, sunny Tuesday and Wednesday partly cloudy both nights, mostly cloudy with a slight (20%) chance of rain Thursday, a (30%) chance of showers Thursday night, a slight (20%) chance of showers Friday, just mostly cloudy Friday night, then mostly cloudy with a slight (20%) chance of showers Saturday highs 62-65 cooling to near 60 Thursday through Saturday lows hovering between 47-50. (seasonal averages high 64 lows 47).

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Forecast for the Cascades of Lane County:  Cloudy with rain this AM, showers in the afternoon, scattered showers and colder tonight, a mix of clouds and sun Monday (Columbus Day), and mostly clear Monday night snow level above 8,000 ft.  today, 7,000 ft. falling to 6,500 ft. late tonight, free air freezing level 9,000 ft. Monday, 10,000 ft. Monday night highs 54-50 lows 40-32 . Mostly sunny Tuesday and Wednesday, clear Tuesday night, mostly clear Wednesday night, and partly cloudy with a slight (20%) of rain Thursday, mostly cloudy with a (30%) chance of rain Thursday night and Friday, a slight (20%) chance of rain Friday night,  and partly cloudy with a  slight (20%) chance of rain Saturday free air freezing level 12,000 ft. Tuesday, 13,000 ft. Tuesday night through Wednesday night, 12,000 ft.,  a snow level above 8,000 ft. Thursday through Friday, 7,000 ft. Friday night, and 8,000 ft. Saturday highs 62-66 , cooling to 52 Thursday, and to 46 Saturday low 38-33.

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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.