A stronger  upper level High Pressure ridge (the “arch” shaped portion of the yellow lines over the Pacific) is moving toward us and will switch our airflow from onshore to offshore warming us up quite rapidly. Some locations in the valleys will see 90 degrees or above before the end of next week as a result of that strong high pressure ridge.

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Advisories:  NONE AT THIS TIME.

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The Updated Pollen Count Forecast for the Eugene-Springfield area : Trees LOW, Grass 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 much warmer today, then clear at night high 88 low 56 . Sunny and warmer (actually hot) Wednesday and Thursday, mostly clear Wednesday night  highs 91-93 low 56. A mix of clouds and sun Friday, mostly clear at night, then mostly sunny and cooling Saturday through Monday and mostly clear at night highs 93-88 lows 56-54. (seasonal averages high 80 low 50)

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Forecast for the Umpqua Basin including Roseburg:  Partly cloudy this AM, sunny in the afternoon, then mostly clear in the evening, and partly cloudy and warmer tonight through Wednesday night highs 94-99 lows 52-62. Partly cloudy with a slight (20%) chance thunderstorms Thursday through Saturday night, then partly cloudy Sunday and Sunday night then sunny Monday highs 97 Thursday, 92 Friday, warming to 95 Sunday and back down to 90 Monday lows near 60. (seasonal averages high 83 low 54)

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Forecast for the South Oregon Coast including Coos Bay and North Bend: Partly cloudy in the morning, sunny and warmer today, mostly clear in the evening, then partly cloudy at night through Wednesday night highs 75 lows 56-58. Partly cloudy with a slight (20%) chance of thunderstorms and a bit cooler Thursday and Thursday night, mostly cloudy and cooler yet Friday and Friday night with a slight (20%) chance of thunderstorms high 72-67 lows 55. Partly cloudy Saturday through Monday morning, then sunny Monday afternoon highs 70-67 lows 52-55 (seasonal averages highs 66 low 52).

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Forecast for the Cascades of Lane County:  Sunny and warmer today, and clear tonight free air freezing level 13,000 ft. rising to 14,000 ft. tonight high 80 low 52. Mostly sunny Wednesday, mostly clear Wednesday night, mostly sunny Thursday with a slight (20%) chance of afternoon and evening thunderstorms south of Mt. Jefferson, and partly cloudy at night free air freezing level 14,000 ft. falling to 13,000 ft. Thursday night lows 55-57 highs 85-80. A mix of clouds and sun Friday with a slight (20%) chance of afternoon and evening thunderstorms, partly cloudy at night,  free air freezing level 13,000 ft. high 80 low 56. Mostly sunny Saturday through Monday and mostly clear at night free air freezing level 13, 000 ft. rising to 14,000 ft. Sunday highs 83-80 lows 56-59.

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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.