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Advisories: NONE AT THIS TIME.
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An upper air trough of low pressure (“U” shape on the brown line) brought us enough marine air to cool our high temperatures down to more comfortable levels. With high pressure (“Arch” shape on brown line) over southern Canada and the low offshore we will warm up for the weekend. A weak surface wave, this cold front, brings increased chances of fog and maybe a slight chance of a little drizzle along the coast and a short lived increase in late night and early morning clouds inland.
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis: Mostly clear tonight, partly cloudy Friday AM, sunny in the afternoon, mostly clear Friday night, sunny and warmer Saturday, clear Saturday night, sunny and warm Sunday, then partly cloudy Sunday night lows 52-48 warming to 53 Sunday night highs 84-92. Partly cloudy Monday AM, mostly sunny and cooler Monday afternoon, partly cloudy at night and Tuesday AM, then mostly sunny Tuesday afternoon through Thursday afternoon with partly skies in the AM and at night highs 83-85 lows 54-52. (seasonal averages high 84 low 52)
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Forecast for the Umpqua Basin including Roseburg: Mostly clear this evening, partly cloudy with patchy fog late tonight, mostly cloudy with patchy fog Friday AM, sunny in the afternoon, mostly clear Friday night, sunny Saturday, mostly clear Saturday night, mostly sunny Sunday, then mostly clear Sunday night lows 58-55 warming back to 58 Sunday night highs 85-93. Mostly sunny and cooler Monday through Thursday with mostly clear nights highs 87-85 lows 54-58. (seasonal averages high 86 low 56)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening, mostly cloudy with patchy fog tonight and Friday AM, partly cloudy Friday afternoon, mostly clear in the evening, partly cloudy Friday night and Saturday AM, sunny Saturday afternoon, partly cloudy in the evening then mostly cloudy at the shore late Saturday night, mostly clear inland Saturday night, then party cloudy and cooler Sunday and Sunday night lows 56-54 highs 68-62. Mostly cloudy Monday AM, then partly cloudy Monday afternoon through Thursday highs 65-68 lows near 55. (seasonal averages high 65 low 53).
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Forecast for the Cascades of Lane County: Clear tonight, sunny Friday, clear Friday night, sunny and warmer Saturday and Sunday with clear skies at night free air freezing level 15,000 ft. tonight and Friday, 16,000 ft. Friday night, 15,000 ft. Saturday, 16,000 ft. Saturday night, then 15,000 ft. Sunday and Sunday night lows 46-43 warming to near 50 Saturday night and back down to 46 Sunday night highs 74-80. Mostly sunny and cooler Monday through Thursday with mostly clear nights free air freezing level 15,000 ft. Monday and Monday night, 13,000 ft. Tuesday, 14,000 ft. Tuesday night through Wednesday night, then 15,000 ft. Thursday highs near 74 lows near 48.
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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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