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Advisories: NONE AT THIS TIME.
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A high pressure ridge (“Arch” shape on the jet stream) is moving away from us and the airflow behind it is feeding moisture our way. A frontal system is pushing through the Pacific Northwest bringing back the rain, then a break as high pressure takes over again. Upper air low pressure (“U” shape on the jet stream) will move eastward south of us returning the moisture flow for just a chance of precipitation Tuesday night and Wednesday, then a return to high pressure and partly cloudy skies..
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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 evening, partly cloudy with a (40%) chance of showers late tonight (0.25 in. of rain possible), patchy AM fog Monday, partly cloudy in the afternoon and night with areas of fog late at night, mostly cloudy with patchy fog Tuesday AM, a mix of clouds and sun in the afternoon, mostly cloudy with a good (50%) chance of showers Tuesday night, a (30%) chance of showers Wednesday AM, mostly cloudy in the afternoon and at night with patchy fog late Wednesday night lows 38-27 warming to 35 Tuesday night and cooling to near 28 Wednesday night highs 45-48. AM fog Thursday then partly cloudy Thursday night through Sunday highs 44-47 lows 26-30. (seasonal averages high 48 low 36)
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Forecast for the Umpqua Basin including Roseburg: Cloudy with rain this evening, a good (50%) chance of rain late tonight (0.30 in. of rain possible), mostly cloudy Monday AM, becoming partly cloudy in the afternoon, partly cloudy with areas of patchy fog late Monday night and Tuesday AM, partly cloudy in the afternoon, mostly cloudy with a slight (20%) chance of showers Tuesday night and Wednesday, then partly cloudy with patchy fog late Wednesday night lows 39-32 highs 50-52. Partly cloudy with areas of early AM and late night fog Thursday through Saturday, partly cloudy Saturday night, then partly cloudy Sunday after patchy AM fog highs near 50 lows 28-32. (seasonal averages high 50 low 39)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy with rain this evening, a (40%) chance of rain late tonight (0.25 in. of rain possible), mostly cloudy Monday AM, partly cloudy Monday afternoon through Tuesday, mostly cloudy with a slight (20%) chance of evening coastal showers, and a slight (20%) chance of showers inland Tuesday night, mostly cloudy with a slight chance of AM showers Wednesday, then partly cloudy Wednesday night lows 40-44 cooling to 36 Wednesday night highs 50-55. Partly cloudy Thursday through Sunday highs 54-56 cooling to near 50 Sunday lows near 36. (seasonal averages high 53 low 41).
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Forecast for the Cascades of Lane County: Cloudy with rain and snow this evening, rain and snow showers likely (60%) late tonight (1-3 in. of snow possible, 0.25 in. of rain possible), partly cloudy with a slight (20%) chance of rain and snow showers Monday AM, partly cloudy in the afternoon, just mostly clear Monday night, partly cloudy Tuesday, mostly cloudy with a good (50%) chance of rain and snow showers Tuesday night and Wednesday, then partly cloudy Wednesday night snow level 4,500 ft. tonight, 5,000 ft. Monday AM, free air freezing level 9,000 ft. falling to 7,000 ft. late Monday night, 8,000 ft. Tuesday, snow level 5,000 ft. Tuesday night, 4,000 ft. Wednesday, then free air freezing level 6,500 ft. Wednesday night lows 32-27 highs 40-45 cooling to 36 Wednesday. Partly cloudy Thursday and Thursday night, a mix of clouds and sun Friday, then partly cloudy Friday night through Sunday free air freezing level 6,000 ft. Thursday, 7,500 ft. Thursday night, 9,000 ft. Friday, 8,000 ft. Friday night through Saturday night, then rising to 9,000 ft. Sunday highs 42-45 cooling to near 42 Sunday lows near 28.
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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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