A stronger upper level High Pressure ridge (the “arch” shaped portion of the yellow lines over the Pacific) is over us and warmed us up quite rapidly. A record high of 100 degrees in Roseburg Wednesday and one degree below the record high for Eugene Wednesday). Most locations in the valleys will be well above 90 degrees today and near 90 into the weekend as a result of that strong high pressure ridge. It will still be warm and dry this weekend for the Oregon Country Fair.
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Advisories: A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM TODAY FOR THE COAST RANGE, THE ENTIRE I-5 CORRIDOR FROM PORTLAND THROUGH EUGENE AND SOUTH TO COTTAGE GROVE, THE CASCADE FOOTHILLS (INCLUDING THE FOOTHILLS OF LANE COUNTY), AND THE UPPER HOOD RIVER VALLEY.
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The Updated Pollen Count Forecast for the Eugene-Springfield area : Trees LOW, Grass VERY HIGH, and weeds LOW. Data from Allergy and Asthma Research Group.
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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: Sunny and very hot today, and mostly clear at night, and mostly sunny and hot, but not quite as hot Friday highs near 100 today ( setting a new record – old record 96) and 94 Friday low near 65. Mostly sunny Saturday through Wednesday, and mostly clear each night highs 84-88 and near 80 Wednesday lows 54-56. (seasonal averages high 80 low 50)
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Forecast for the Umpqua Basin including Roseburg: Sunny this morning, then partly cloudy with isolated afternoon and evening thunderstorms today through Friday and mostly clear at night highs 99( 100 would tie the record high for the date) -93 low 60. Sunny Saturday AM, partly cloudy Saturday afternoon, and a slight (20%) chance of evening thunderstorms high 92 low 59. Partly cloudy Sunday, mostly sunny Monday and Tuesday, and mostly clear at night Sunday through Tuesday night, then sunny Wednesday highs warming to 93 Sunday and Monday, near 92 Tuesday, and cooling to 85 Wednesday lows near 60. (seasonal averages high 84 low 54)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with patchy AM coastal fog today, AM sun then partly cloudy with isolated afternoon and evening thunderstorms then mostly clear late inland, while partly cloudy with patchy fog at the shore late, partly cloudy Friday with patchy AM fog at the shore, mostly cloudy Friday night with patchy fog late at the shore highs 69-66 lows 52-55. AM clouds and fog then partly cloudy Saturday through Sunday night highs 65-68 lows 55-57. AM clouds then sunny Monday, mostly sunny Tuesday, sunny Wednesday and mostly clear Monday night and Tuesday night highs 69-66-70 lows 54-56. (seasonal averages highs 66 low 52).
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Forecast for the Cascades of Lane County: Mostly sunny today and Friday, and mostly clear tonight and Friday night free air freezing level 14,000 ft. falling to 13,000 ft. tonight highs 88-84 lows 57-54. Mostly sunny Saturday through Wednesday and mostly clear at night free air freezing level 13, 000 ft. rising to 15,000 ft. Sunday and 15,000 ft. Monday through Wednesday highs hovering at or very near 80 lows 55-60.
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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.