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Advisories: NONE AT THIS TIME.
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The upper level low (“U” shape sliding southward eastward over southern B.C. and Washington) is moving through the Pacific Northwest. We’ll warm up a bit again through the weekend as a high pressure ridge (“Arch” shape in blue arrows west of Oregon) starts to build in. Another upper level low will slide in behind the ridge early next week. A cold front will approach the Oregon coast Sunday morning bringing more clouds and cooler temperatures again. So far, and I emphasize so far, it looks like the Labor Day weekend will nice and dry, but it is too early to be certain.
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Forecast for the Umpqua Basin including Roseburg: Clear tonight, sunny Saturday, mostly clear Saturday evening, mostly cloudy with patchy fog late Saturday night, mostly cloudy Sunday, mostly cloudy Sunday night with a slight (20%) chance of showers late at night and Monday AM, then mostly cloudy Monday afternoon and Monday night lows 52-55 highs 82-78. Mostly cloudy with a slight (20%) chance of showers Tuesday AM, partly cloudy in the afternoon, mostly cloudy Tuesday night and Wednesday, then partly cloudy Wednesday night through Friday and warmer Friday highs 77-87 lows near 52. (seasonal averages high 84 low 55)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly clear tonight, mostly cloudy Saturday with patchy AM coastal fog, sunny inland in the AM and partly cloudy in the afternoon, mostly clear in the evening, mostly cloudy with patchy fog Saturday night, mostly cloudy with a slight (20%) chance of showers Sunday afternoon, a (30%) chance of showers Sunday night, a slight (20%) chance of showers Monday, then mostly cloudy in the evening and partly cloudy late Monday night 51-54 highs 63-68. Partly cloudy with a slight (20%) chance of showers Tuesday AM, mostly cloudy Tuesday afternoon through Wednesday, then partly cloudy Wednesday night through Friday highs near 64 lows 53-50. (seasonal averages high 66 low 53).
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Forecast for the Cascades of Lane County: Clear tonight, mostly sunny Saturday, mostly clear Saturday night, mostly sunny Sunday AM, then partly cloudy Sunday afternoon through Monday night free air freezing level 14,000 ft. tonight through Saturday night, 13,000 ft. Sunday, 12,000 ft. Sunday night, 13,000 ft. Monday, then 12,000 ft. Monday night lows 43-47 cooling to near 43 Monday night highs 75-66. Partly cloudy Tuesday and Tuesday evening, mostly cloudy late Tuesday night, a mix of clouds and sun Wednesday, then partly cloudy Wednesday night through Friday free air freezing level 11,000 ft. Tuesday, 12,000 ft. Tuesday night through Thursday, then 13,000 ft. Thursday night and Friday highs 66-72 lows near near 43.
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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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