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Advisories: A RED FLAG WARNING IS IN EFFECT THROUGH 11 PM TONIGHT FOR NORTH CENTRAL OREGON, NORTH, CENTRAL, AND SOUTHERN OREGON CASCADES, THE FOOTHILLS OF DOUGLAS COUNTY, JACKSON, KLAMATH, AND LAKE COUNTIES. A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE JOHN DAY HIGHLANDS, THE JOHN DAY BASIN, AND THE SOUTHERN BLUE MOUNTAINS OF OREGON. A HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM TONIGHT FOR THE EASTERN COLUMBIA RIVER GORGE.
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A high pressure ridge (“Arch” shape on brown line) strengthened to keep us hot through Friday. We are feeling cooling, but a bit more humid for the rest of the weekend as the ridge weakens and a low off the coast moves to the north. Thunderstorms are possible for the mountains this evening due to cooler air moving down from aloft and the warm moist air movin in from the south around the low. A cold front will approach the coast Wednesday and start moving through the Pacific Northwest Thursday. It doesn’t look like it will do much to change our weather except to cool us down .
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Forecast for the Umpqua Basin including Roseburg: Partly cloudy with areas of smoke tonight through Tuesday night lows near 55 highs 85-77. Partly cloudy Wednesday through Thursday night, mostly sunny Friday, mostly clear Friday night, then partly cloudy Saturday highs 80-84 lows 54-48. (seasonal averages high 85 low 55)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy this evening, cloudy with patchy fog late tonight and Sunday AM, partly cloudy in the afternoon and evening, cloudy with patchy fog late Sunday night and Monday AM, partly cloudy Monday afternoon and evening, mostly cloudy with patchy fog late Monday night and Tuesday AM, then mostly cloudy skies and some lingering fog Tuesday afternoon and Tuesday night lows 50-56 highs 64-66. Patchy AM and late night fog Wednesday and Wednesday night with some lingering afternoon fog, partly cloudy with patchy fog Wednesday night and Thursday AM, then partly cloudy Thursday afternoon through Saturday highs 65-62 warming to 65 Friday lows 54-50. (seasonal averages high 65 low 53).
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Forecast for the Cascades of Lane County: Hazy with a slight (20%) chance of thunderstorms this evening, partly cloudy and cooler late tonight and Sunday AM, mostly sunny in the afternoon, partly cloudy Sunday night and Monday AM, mostly sunny in the afternoon, partly cloudy with a slight (20%) chance of showers in the evening, then just partly cloudy Monday night and Tuesday AM, mostly sunny in the afternoon, then partly cloudy Tuesday night free air freezing level 14,000 ft. tonight, 13,000 ft. Sunday through Monday, snow level above 8,000 ft. Monday night, free air freezing level 12,000 ft. Tuesday, then 13,000 ft. Tuesday night lows 49-45 highs 70-66. Mostly sunny Wednesday AM, partly cloudy Wednesday afternoon through Thursday night, mostly sunny Friday AM, partly cloudy Friday afternoon and Friday night, then mostly sunny Saturday free air freezing level 13,000 ft. Wednesday and Wednesday night, 14,000 ft. Thursday, then 12,000 ft. Thursday night through Saturday 68-62 lows 45-42.
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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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