A stronger upper level High Pressure ridge (the “arch” shaped portion of the yellow lines) is over us and warmed us up quite rapidly. We did cool off a bit in the valleys yesterday. Most locations in the valleys will from near 90 to below 90 into the weekend as a result of that strong high pressure ridge moving . It will still be warm and dry this weekend for the Oregon Country Fair. A trough of low pressure will slide down from the Gulf of Alaska helping a cold front to drop down from the northwest Tuesday and cool us down a bit more.
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Advisories: A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM THIS EVENING FOR 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: Mostly sunny and hot, about like yesterday, mostly cloudy tonight, mostly sunny and cooler Saturday, and partly cloudy Saturday night highs 92-84 lows 56-50. A mix of clouds and sun Sunday, mostly clear at night, sunny and cooler Monday highs 87-80 low 53. Mostly clear Monday evening, mostly cloudy at night and Tuesday morning, then mostly sunny and cooler in the afternoon, and partly cloudy Tuesday night lows 53-50 highs 84-79 . A mix of clouds and sun Wednesday, mostly clear at night, and mostly sunny Thursday highs 80-78 low 50. (seasonal averages high 80 low 50)
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Forecast for the Umpqua Basin including Roseburg: Sunny this AM with isolated afternoon and evening thunderstorms high 96 low 56. Sunny Saturday, mostly cloudy with patchy fog at night and a slight (20%) chance of drizzle late at night, AM clouds Sunday morning, sunny Sunday afternoon and cooler through Thursday, and mostly clear at night highs 88 Saturday, 91 Sunday, near 90 Monday through Wednesday, and 86 Thursday lows near 57-62. (seasonal averages high 84 low 54)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy today with patchy AM fog at the shore, mostly cloudy tonight with patchy fog late at the shore high 66 low 55. AM clouds and fog then partly cloudy Saturday, partly cloudy with patchy fog late at night late at the shore otherwise mostly cloudy at night with a slight (20%) chance of drizzle late at night with patchy fog late at night high 65 low 55. Partly cloudy with AM and late night fog Sunday and Sunday night, AM clouds and fog then mostly sunny Monday, mostly clear in the evening and partly cloudy Monday night, AM fog then partly cloudy Tuesday through Wednesday highs 68-64 lows 55-52. Mostly clear Wednesday night then mostly sunny Thursday low 55 high 63. (seasonal averages high 66 low 52).
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Forecast for the Cascades of Lane County: Mostly sunny today with a slight (20%) chance of a thunderstorm this afternoon and evening, mostly sunny Saturday and Sunday, mostly clear at night free air freezing level 13,000 ft. highs 85-80-85 lows 58-50 . Sunny Monday and Tuesday, mostly sunny and cooler Wednesday and Thursday, and mostly clear nights mostly clear at night free air freezing level 15, 000 ft. Monday falling to 14, 000 ft. Monday and Monday night and to 14,000 ft. Tuesday and Tuesday night, 12,000 ft. Wednesday and Wednesday night rising to 13,000 ft. Thursday highs 81-70 lows 50-46.
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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.