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Advisories: AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM 1 PM THURSDAY THROUGH 9 PM FRIDAY FOR MOST OF WESTERN OREGON FROM THE COAST TO THE CASCADE FOOTHILLS AND SOUTHEAST FROM FLORENCE THROUGH COTTAGE GROVE.
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A high pressure ridge (“Arch” shape on brown line) has been building over us and allowed for hot weather. The high pressure ridge will strengthen for another round of increasing temperatures back to hot, then cooling, but more humid for the weekend .
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Forecast for the Umpqua Basin including Roseburg: Partly cloudy this AM, sunny and Hot this afternoon, clear tonight, sunny and Hot Thursday, mostly clear Thursday night, partly cloudy with a slight (20%) chance of thunderstorms Friday afternoon and evening, and mostly cloudy with a slight (20%) chance of thunderstorms late Friday night highs 98-100 cooling (?) to 96 Friday lows 63-60. Mostly cloudy with a slight (20%) chance of thunderstorms Saturday afternoon and evening, partly cloudy late Saturday night and Sunday AM, sunny and cooler Sunday afternoon, mostly clear in the evening, partly cloudy late Sunday night through Tuesday AM, then sunny Tuesday afternoon highs 89-82 lows 57-54. (seasonal averages high 85 low 56)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with patchy coastal fog early this AM, sunny this afternoon, mostly clear inland at night, mostly cloudy with patchy coastal fog late tonight, partly cloudy with patchy coastal fog Thursday AM, sunny and warmer Thursday afternoon, mostly clear in the evening then partly cloudy late Thursday night inland and cloudy with patchy coastal fog again, cloudy with patchy AM coastal fog, partly cloudy with a slight (20%) chance of thunderstorms Friday afternoon, then partly cloudy with patchy fog land a slight (20%) chance of thunderstorms late Friday night highs 62-60 lows 53-55. Mostly cloudy with patchy fog Saturday AM, partly cloudy with a slight (20%) chance of thunderstorms in the afternoon and evening, partly cloudy with patchy fog Saturday night and Sunday AM, sunny in the afternoon, then partly cloudy Sunday night through Tuesday highs 63-65 lows near 54. (seasonal averages high 65 low 53).
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Forecast for the Cascades of Lane County: Sunny and warmer today, clear tonight, sunny and warmer Thursday, mostly clear Thursday night, mostly sunny Friday AM, partly cloudy with a slight (20%) chance of thunderstorms Friday afternoon and evening, then a slight (20%) chance of showers late Friday night free air freezing level 16,000 ft. today through Friday, then snow level above 8,000 ft. Friday night highs 85-90 lows 59-63 cooling to near 54 Friday night. A mix of clouds and sun Saturday with a slight (20%) chance of showers in the AM, a slight (20%) chance of thunderstorms in the afternoon and evening, partly cloudy with a slight (20%) chance of thunderstorms late Saturday night and Sunday AM, partly cloudy and cooler Sunday afternoon and Sunday night, mostly sunny with a slight (20%) chance of showers Monday afternoon and evening, mostly clear at night, then partly cloudy Tuesday snow level above 8,000 ft. Saturday, free air freezing level 15,000 ft. Saturday night through Sunday, snow level above 8,000 ft. Sunday night through Monday night, then free air freezing level 14,000 ft. Tuesday highs 78-70 lows 49-44.
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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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