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Advisories: A RED FLAG WARNING IS IN EFFECT THROUGH TONIGHT FOR THE NORTH AND CENTRAL OREGON CASCADES AND FOOTHILLS, THROUGH SUNDAY EVENING FOR THE COAST RANGE, THE WILLAPA HILLS, AND ALL OF THE WILLAMETTE VALLEY. A RED FLAG WARNING IS IN EFFECT THROUGH 11 PM TONIGHT FOR THE UMPQUA NATIONAL FOREST AND THE SOUTH CASCADES OF OREGON. THAT MEANS THERE IS A HIGH FIRE DANGER FOR THE AREAS LISTED. A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM TONIGHT FOR THE ENTIRE WILLAMETTE VALLEY, THE NORTHERN OREGON CASCADE FOOTHILLS, THE FOOTHILLS OF LANE COUNTY, THE NORTH AND CENTRAL OREGON FOOTHILLS, AND THE NORTH AND CENTRAL COAST RANGE, THE WILLAPA HILLS, AND THE UPPER HOOD RIVER VALLEY.
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We will be staying under a blocking high pressure ridge (“Arch” shape covering the Pacific Northwest) assuring that we will stay from very warm to hot. On the back side of the ridge the airflow will be from the west bringing more clouds and a frontal system will move in early next week and that should break the back of this heat wave.
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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 sunny and still very warm today, mostly clear tonight, partly cloudy in the AM, mostly sunny but cooler Monday afternoon, mostly clear in the evening, mostly cloudy Monday night and Tuesday AM, mostly sunny and cooler in the afternoon, mostly clear Tuesday evening, then cloudy Tuesday night highs 90-80 lows 53-50. Cloudy Wednesday AM, mostly sunny Wednesday afternoon, mostly clear in the evening, cloudy Wednesday night and Thursday AM, a mix of clouds and sun Thursday afternoon, partly cloudy in the evening, cloudy Thursday night and Friday AM, partly cloudy and warmer Friday afternoon through Saturday AM, then mostly sunny and warmer Saturday afternoon highs 75-80 lows 49-44. (seasonal averages high 79 low 48)
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Forecast for the Umpqua Basin including Roseburg: Sunny and still hot today, partly cloudy tonight and Monday AM, mostly sunny Monday afternoon and Tuesday afternoon, mostly clear in the evening, then partly cloudy and cooler both nights highs 93-83 lows 56-50. Partly cloudy Wednesday through Saturday with patchy AM and late night fog through Friday highs 82-77 warming to 82 Saturday lows near 50. (seasonal averages high 80 low 52)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Cloudy early this AM with patchy fog, partly cloudy this afternoon and evening, mostly cloudy with patchy fog late at night and early Monday AM, partly cloudy Monday afternoon and evening, mostly cloudy with patchy fog late Monday night and early Tuesday AM, partly cloudy Tuesday afternoon, then mostly cloudy Tuesday night highs near 62 lows near 52. Mostly cloudy Wednesday, mostly cloudy with patchy fog Wednesday night through Friday, then just mostly cloudy Friday night and Saturday highs 64-68 lows near 50. (seasonal averages high 65 low 51).
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Forecast for the Cascades of Lane County: Mostly sunny and cooler today (partly cloudy near the crest) through Tuesday, mostly clear at night free air freezing level 14,000 ft. tonight through Tuesday night highs 82-72 lows 52-48. A mix of clouds and sun Wednesday AM, mostly sunny in the afternoon, mostly clear in the evening, mostly cloudy Wednesday night and Thursday AM, a mix of clouds and sun Thursday afternoon,mostly cloudy Thursday night and Friday AM, partly cloudy Friday afternoon and evening, mostly clear Friday night, then mostly sunny Saturday free air freezing level 14,000 ft. Wednesday and Wednesday night, then 13,000 ft. Thursday through Saturday highs 65-70 lows 50-42.
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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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