An Upper Level Low Pressure Trough (“U “Shape) keeps up the onshore airflow to control temperatures. The graphics for days 1-3 show no frontal systems moving into the Pacific Northwest. The graphics for days 3-7 Friday through Tuesday show a frontal system on the way to Oregon between Thursday and Friday. Another front looks like it will slide down from the north next Monday.
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ADVISORIES:
- NONE AT THIS TIME.
HEALTH ADVISORIES:
- A PERMANENT HEALTH ADVISORY REMAINS IN EFFECT FOR THE SOUTH UMPQUA RIVER BAR. POOLS IN THE BEDROCK ALONG THE RIVERS EDGE ARE KNOWN TO DEVELOP BLUE-GREEN ALGAE (CYANOBACTERIAL) BLOOMS THAT CAN BE HARMFUL TO PETS AND PEOPLE IF ACCIDENTAL INGESTION OCCURS. SIGNS HAVE BEEN POSTED ALONG SEVERAL ACCESS AREAS ALONG THE RIVER.
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Air Quality Index:
Eugene/Springfield: The Air Quality Index is 33 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 27 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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Eugene-Springfield Area Pollen count:
GRASS: 5 MODERATE
TREES: 0 ABSENT
WEEDS: 0 LOW
Measured 8.4.25
Data courtesy of Oregon Allergy Associates.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Sunny and a bit warmer today, partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain late tonight,
- Mostly cloudy with a slight (20%) chance of AM rain, a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Wednesday, mostly cloudy with a slight (20%) chance of showers late at night,
- AM clouds, mostly sunny and a bit warmer Thursday afternoon, then partly cloudy late Thursday night.
- highs 84-80 warming back to 84 Thursday lows 58-52.
- Sunny and a bit warmer Friday and Saturday, mostly clear both nights,
- Sunny Sunday, clear Sunday night,
- Then sunny and a bit warmer Monday.
- highs 88-97 lows 56-59. (seasonal averages high 86 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Areas of AM fog, sunny and a bit warmer this afternoon, partly cloudy this evening, mostly cloudy with a slight (20%) chance of showers late tonight,
- Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy Wednesday afternoon, mostly cloudy with a slight (20%) chance of showers Wednesday night and patchy fog late at night,
- Mostly cloudy patchy AM fog, partly cloudy Thursday afternoon, then partly cloudy Thursday night.
- highs 86-85 warming back to 86 Thursday lows 62-63 cooling to 57 Thursday night.
- Sunny and a bit warmer Friday, clear Friday night,
- Mostly sunny and a bit warmer Saturday and Sunday, clear both nights,
- Then sunny and a bit warmer (Hot) Monday.
- highs 90-100 lows 60-65. (seasonal averages high 87 low 58).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy with areas of AM coastal fog while patchy AM inland fog, sunny and a bit warmer this afternoon, mostly cloudy with patchy coastal fog and a slight (20%) chance of showers late tonight while partly cloudy inland this evening and mostly cloudy with a slight (20%) chance of inland showers late tonight and patchy fog late tonight,
- Mostly cloudy with a slight (20%) chance of coastal showers Wednesday while mostly cloudy with patchy fog and a slight (20%) chance of inland AM showers, mostly cloudy and a bit warmer inland Wednesday afternoon, mostly cloudy with patchy fog and a slight (20%) chance of evening showers, then mostly cloudy with areas of fog late at night,
- Mostly cloudy with AM fog and a slight (20%) chance of showers, just partly cloudy Thursday afternoon, then mostly cloudy Thursday night.
- highs near 74 lows 59-54.
- Mostly sunny and a bit warmer Friday, mostly clear Friday night,
- Then mostly sunny Saturday, Sunday, and Monday, mostly clear each night.
- highs near 76 lows near 57.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit warmer today, partly cloudy this evening, mostly cloudy late tonight,
- Mostly cloudy with a slight (20%) chance of AM rain, mostly sunny and a bit cooler with a slight (20%) chance of showers Wednesday afternoon, mostly cloudy with a slight (20%) chance of showers at night,
- Mostly sunny and a bit warmer Thursday, then partly cloudy Thursday night.
- free air freezing level 13,000 ft. today and tonight, snow level above 8,000 ft. Wednesday and Wednesday night, free air freezing level 13,000 ft. Thursday, then 14,000 ft. Thursday night,
- highs 70-68 warming back to 70 Thursday lows 46-48 cooling t0 44 Thursday night.
- Sunny and a bit warmer Friday and Saturday, mostly clear both nights,
- Then sunny and a bit warmer Sunday and Monday, mostly clear Sunday night.
- free air freezing level 15,000 ft. Friday, 16,000 ft. Friday night and Saturday, above 16,000 ft. Saturday night through Sunday night, then 16,000 ft. Monday.
- highs 77-85 lows 50-55.
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