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An upper level upper level High Pressure ridge (“Arch” shaped area) is starting to move eastward away from us. An upper level trough of low pressure (the “U” shaped area stretching down from over the Gulf of Alaska) will start changing our weather and help send moisture ahead of a cold front that is approaching the coast. Another frontal system will move through Oregon Sunday.
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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: Mostly cloudy with a (40%) chance of drizzle or sprinkles this evening, then rain likely (60%) tonight, mostly cloudy with showers likely (60%) Friday AM, a slight (20%) chance of afternoon showers, rain Friday night, rain likely (60%) Saturday, and rain Saturday night lows 44-47 highs 62-59 . Mostly cloudy with AM rain then afternoon showers Sunday, rain Sunday night, rain likely (60%) Monday, mostly cloudy with showers likely (60%) Monday night and Tuesday, and mostly cloudy with a (30%) chance of showers Tuesday night and Wednesday, a (40%) chance of rain Wednesday night, and partly cloudy with a (40%) chance of rain Thursday highs 60-52 warming to 57 Thursday lows 44-35. (seasonal averages highs 62 low 40)
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Forecast for the Umpqua Basin including, Roseburg: Mostly cloudy with rain likely (60%) tonight, a good (50%) chance of showers Friday, rain Friday night, rain Friday night, rain likely (60%) Saturday, rain Saturday night lows 46-53 highs near 65. Mostly cloudy with rain and breezy Sunday, rain Sunday night, rain likely (60%) Monday, cloudy with a good (50%) chance of showers Monday night through Tuesday night, and mostly cloudy with a (40%) chance of showers Wednesday through Thursday highs 56-60 lows 46-40. (seasonal averages high 67 low 43)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with rain at the shore and rain likely inland tonight, cloudy with a good (50%) chance of showers Friday, rain Friday night, rain likely (60%) Saturday, and rain Saturday night lows 46-55 highs 58-60. Mostly cloudy with rain and windy Sunday, rain and colder Sunday night, rain likely (60%) Monday, showers likely (60%) Monday night and Tuesday, cloudy with a good (50%) chance of showers Tuesday night, and mostly cloudy with a (40%) chance of showers Wednesday through Thursday highs 56-60 lows 48-42. (seasonal averages high 62 lows 45).
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Forecast for the Cascades of Lane County: Mostly cloudy with a good (50%) chance of rain this evening, rain likely (60%) late tonight, mostly cloudy and cooler Friday with AM showers likely (60%) and a good (50%) chance of showers in the afternoon, rain Friday night (1″-3″of snow), rain likely (60%) Saturday, and rain Saturday night snow level 7,000 ft. late tonight, 6,000 ft. Friday through Saturday, 7,000 ft. Saturday night lows near 36 highs 45-48. Mostly cloudy with AM rain, showers and breezy Sunday afternoon, breezy with rain and snow Sunday night, rain and snow Monday, rain and snow showers likely (60%) Monday night, mostly cloudy with a good (50%) chance of rain and snow Tuesday, a (40%) chance of rain and snow showers Tuesday night, a slight (20%) chance of showers Wednesday, a slight (20%) chance of rain Wednesday night, and partly cloudy with a good (50%) chance of rain Thursday snow level 6,000 ft. Sunday afternoon, dropping to 4,500 ft. Sunday night, and 4,000 ft. Monday through Tuesday, rising to 4,500 ft. Tuesday night, 5,500 ft. Wednesday, and 8,000 ft. Wednesday night and Thursday highs 44-34 Tuesday warming from 40 to 48 Wednesday and Thursday lows 37-26 Tuesday night warming to 33 Wednesday night.
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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.