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An upper level High Pressure ridge (“Arch” shaped shaded area) has build up to protect us from any storms for a short while. Another large trough of low pressure trough (“U” shaded area over the ocean) will come in behind the ridge by late in the week. A cold front will be moving through the Pacific Northwest Friday (position shown on Saturday) with another behind it bringing back more wet weather. Yet another frontal system will march through on Wednesday.
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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 clear with late night and early AM fog tonight and Thursday, a mix of clouds and sun Thursday afternoon, partly cloudy Thursday night, mostly cloudy Friday with a slight (20%) chance of afternoon rain, a (30%) chance of evening rain, then a good (50%) chance of showers late Friday night lows 47-40 highs 67-58. Mostly cloudy with a good (50%) chance of showers Saturday, mostly cloudy with rain likely (60%) Saturday night and Sunday, mostly cloudy with a good (50%) chance of rain Sunday night through Tuesday, and (40%) Tuesday night and Wednesday highs 59-50 lows 46-40. (seasonal averages highs 56 low 38)
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Forecast for the Umpqua Basin including, Roseburg: Mostly clear this evening, partly cloudy with patchy fog late tonight and Thursday AM, partly cloudy Thursday afternoon and night, mostly cloudy with a (40%) chance of afternoon rain and much cooler Friday, mostly cloudy with rain likely (60%) Friday night lows near 48 highs 69-59. Showers likely (60%) Saturday, rain likely (60%) Saturday night and Sunday, mostly cloudy with a (50%) chance of rain Sunday night and Monday, (40%) Monday night, cloudy with a good (50%) chance of showers Tuesday, mostly cloudy with a (40%) chance of showers Tuesday night, and cloudy with a (40%) chance of showers Wednesday highs 60-50 lows 46-40. (seasonal averages high 60 low 41)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy with patchy coastal fog late tonight and Thursday AM, partly cloudy Thursday afternoon and night, mostly cloudy with a (40%) chance of rain Friday, rain likely (60%) Friday night lows near 50 highs 60-50. Mostly cloudy with showers likely (60%) Saturday, rain likely (60%) Saturday evening, then rain and breezy late Saturday night, rain likely (60%) Sunday, a good (50%) chance of showers Sunday night, showers likely (60%) Monday, a (40%) chance of showers Monday night, cloudy with a (40%) chance of showers Tuesday, then mostly cloudy with a good (50%) chance of showers Tuesday night and Wednesday highs near 55 lows 48-40. (seasonal averages high 59 lows 44).
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Forecast for the Cascades of Lane County: Mostly clear tonight, mostly sunny Thursday, partly cloudy Thursday night, mostly cloudy Friday with a slight (20%) chance of afternoon rain, a (40%) chance of evening rain, then showers likely (60%) late Friday night free air freezing level 14,000 ft. tonight, 13,000 ft. Thursday, 14,000 ft. in the evening and 13,000 ft. Thursday night, 12,000 ft. Friday falling to above 8,000 ft. in the afternoon, snow level 7,000 ft. Friday night lows 41-33 highs 62-50. Mostly cloudy with a good (50%) chance of showers Saturday, rain Saturday night, rain likely (60%) Sunday, mostly cloudy with a (40%) chance of rain Sunday night through Wednesday snow level 6,000 ft. Saturday, and 7,000 ft. Saturday night, 6,000 ft. Sunday, snow level takes a dive to 4,000 ft. Sunday night, 3,000 ft. Monday, 2,500 ft. Monday night and Tuesday, 3,500 ft. Tuesday night, and 4,500 ft. Wednesday highs 47-30 warming to near 36 Tuesday and Wednesday lows 36-24 warming to 34 Wednesday.
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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.