A high pressure ridge (the “arch” shape,  from the ocean into Canada, in the yellow line) will turn the onshore airflow to offshore and that means heat from Eastern Oregon will be pushed our way heating us up rapidly over the weekend, but it won’t last very long.

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Advisories:   NONE AT THIS TIME.

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The 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: AM clouds then mostly sunny today, and mostly clear at night high 80 low 45. AM clouds, sunny and warmer Friday, clear Friday night, sunny and even warmer Saturday and clear at night highs 86-93 lows 49-52. Mostly sunny and slow cooling Sunday through Wednesday with mostly clear each night highs 89-83 lows 56-50. (seasonal averages high 83 low 51)

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Forecast for the Umpqua Basin including Roseburg:  AM clouds then sunny and warmer this afternoon, clear tonight, sunny and hot Friday, and mostly clear Friday night  highs 90-96 lows near 54.  Sunny Saturday, mostly clear in the evening and partly cloudy overnight, partly cloudy with a slight (20%) chance of  thunderstorms and not as warm Sunday and Sunday night, then partly cloudy Monday highs 98-88 lows near 60. Partly cloudy Monday evening with a slight (20%) chance of thunderstorms, partly cloudy Tuesday, mostly clear Tuesday night, and mostly sunny Wednesday lows 55-58 highs 88-85 . (seasonal averages high 87 low 55)

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Forecast for the South Oregon Coast including Coos Bay and North Bend:  Patchy AM coastal fog otherwise cloudy in the morning then sunny this afternoon high 64 low 52. Partly cloudy this evening and mostly cloudy at night at the shore, mostly clear this evening and partly cloudy at night inland, and partly cloudy Friday low 49 high near 65. Mostly clear, then mostly cloudy with patchy fog late Friday night at the shore and mostly clear inland, partly cloudy with patchy AM, afternoon, and late night fog Saturday through Sunday lows near 52 highs . Mostly cloudy with patchy fog Sunday night and Monday, then just mostly cloudy Monday night through Tuesday night, then partly cloudy Wednesday lows 49-53 highs 65-62. (seasonal averages high 67 low 49).

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Forecast for the Cascades of Lane County:  Mostly sunny today, clear tonight and Friday night, sunny and warmer Friday and Saturday free air freezing level  14,000 ft. rising to 15,000 ft. tonight, 16,000 ft. Friday and Friday night, falling to 15,000 ft. Saturday and Saturday night lows 46-42-48 highs 75-83-88. Mostly sunny and cooler Sunday, and clear Sunday night free air freezing level rising to 16,000 ft. Sunday night high 80 low 47. Mostly sunny Monday with just a slight (20%) chance of afternoon and evening thunderstorms, then mostly clear Monday night,  a mix of clouds and sun and cooler Tuesday with a slight (20%) chance of afternoon and evening showers, mostly clear at night, and mostly sunny Wednesday with a slight (20%) chance of afternoon showers free air freezing level 15,000 ft. falling to a snow level of  above 8,000 ft. Tuesday through Wednesday highs 82-73 lows 48-44.

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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.