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An upper level low over Washington and Oregon (see “U” shape formed by the blue arrows) is increasing the onshore air flow as it moves to the East.. That means more clouds and even a chance of some light rain or drizzle along the Oregon coast. A weak cold front is sliding down (and falling apart) from the Northwest over this weekend. There is still smoke high in the atmosphere over us from Canadian fires. So far that smoke has not come down to the surface. Smoke is still collecting over the Deschutes National Forest near Sisters and could slowly move toward us if and when the offshore airflow returns pushing the smoke from East to West.
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Advisories: NONE AT THIS TIME.
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The summer Pollen Count Forecast season for the Eugene-Springfield area is over. 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 cloudy tonight and Sunday AM, a mix of clouds and sun in the afternoon, partly cloudy in the evening, mostly cloudy Sunday night and Monday AM, a mix of clouds and sun in the afternoon, then partly cloudy Monday night lows 54-50 highs 77-80. A mix of clouds and sun and warmer Tuesday through Friday, and partly cloudy each night highs 82-86 lows 50-53. Mostly clear Friday night and mostly sunny Saturday low 53 high 86. (seasonal averages high 83 low 51)
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Forecast for the Umpqua Basin including, Roseburg: Partly cloudy this evening, becoming mostly cloudy with a slight (20%) chance of drizzle late tonight and Sunday AM, sunny in the afternoon, mostly clear Sunday evening, then mostly cloudy at night and Monday morning, mostly sunny and a bit warmer Monday afternoon, becoming mostly cloudy Monday night lows 60-53 highs 80-83. Partly cloudy Tuesday through Wednesday, mostly clear Wednesday night and Thursday night, mostly sunny and a bit warmer Thursday, AM clouds then sunny and warmer Friday, and partly cloudy Friday night and a bit warmer yet Saturday highs 83-92 lows holding at 55-58. (seasonal averages high 87 low 55)
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Forecast for the South Oregon Coast including Coos Bay and North Bend: Mostly cloudy with areas of drizzle late tonight and Sunday AM, then mostly cloudy Sunday afternoon and night with patchy fog and drizzle late night and Monday morning, partly cloudy and cooler Monday afternoon and evening, then mostly cloudy with patchy fog at night lows 52-48 highs 65-60. AM fog and clouds then mostly cloudy and a bit warmer Tuesday through Saturday with lingering patchy fog highs 60-64 lows near 49-54. (seasonal averages high 67 low 53).
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Forecast for the Cascades of Lane County: Partly cloudy this evening then mostly cloudy with a slight (20%) chance of sprinkles or drizzle (mainly North) tonight and Sunday AM, a mix of clouds and sun Sunday, partly cloudy Sunday night, and a mix of clouds and sun and a bit cooler Monday snow level above 8,000 ft. through Sunday rising to a free air freezing level of 13,000 ft. Sunday night and Monday lows 47- 43 highs 73-70. Mostly clear Monday night, mostly sunny Tuesday with a slight (20%) chance of afternoon and evening showers, and mostly clear Tuesday night free air freezing level 12,000 ft. Monday night falling to a snow level above 8,000 ft. Tuesday and Tuesday night lows 44-46 high 72-69. Mostly sunny and a bit warmer Wednesday through Friday, mostly sunny and a bit cooler Saturday, and mostly clear each night free air freezing level 10,000 ft. Wednesday rising to 16,000 ft. Thursday night and Friday, and lowering to 15,000 ft. Friday night and Saturday highs 73-77 (cooling to 73 Saturday) lows 45-50.
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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.