Aug
02.
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 Wednesday through Sunday show a frontal system on the way to Oregon between Thursday and Friday.
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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 31 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 20 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: 2 LOW
WEEDS: 0 ABSENT
Measured 7.31.25
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:
- Mostly sunny and a bit cooler today, partly cloudy tonight,
- Sunny Monday, mostly clear in the evening, partly cloudy late at night,
- Mostly sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
- highs 82-85 lows 52-57.
- AM cloudy, a mix of clouds and sun and a bit cooler Wednesday afternoon, mostly cloudy Wednesday night,
- AM clouds, mostly sunny and a bit warmer Thursday afternoon, mostly cloudy in the evening, partly cloudy late at night,
- Then sunny and a bit warmer Friday and Saturday, mostly clear Friday night.
- highs 83-95 lows near 57. (seasonal averages high 86 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy and a bit cooler today, partly cloudy tonight,
- Some AM clouds, sunny Monday afternoon, mostly clear in the evening, partly cloudy late at night,
- Sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
- highs 82-88 lows 55-62.
- Partly cloudy and a bit cooler Wednesday, partly cloudy Wednesday night,
- Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer Thursday afternoon, partly cloudy at night,
- Mostly sunny and a bit warmer Friday, mostly clear Friday night,
- Then sunny and a bit warmer Saturday.
- highs 85-95 lows 62-60. (seasonal averages high 87 low 58).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- AM clouds with patchy fog, partly cloudy and a bit warmer this afternoon, mostly cloudy tonight,
- AM clouds, sunny and a bit warmer Monday afternoon, partly cloudy at night,
- Partly cloudy and a bit warmer Tuesday, then mostly cloudy Tuesday night.
- highs 69-74 lows 53-58.
- Mostly cloudy and a bit warmer Wednesday, mostly cloudy Wednesday night,
- AM clouds with a slight (20%) chance of showers, just mostly cloudy Thursday afternoon, mostly cloudy at night,
- Mostly cloudy start, sunny Friday afternoon, mostly clear Friday night,
- Then mostly sunny and a bit warmer Saturday.
- highs 74-78 lows 58-55.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly sunny and a bit cooler with a slight (20%) chance of showers this afternoon, partly cloudy with slight (20%) chance of evening showers, just partly cloudy tonight,
- Sunny and a bit cooler Monday, mostly clear in the evening, partly cloudy late at night,
- Sunny and a bit warmer Tuesday, then partly cloudy Tuesday night.
- snow level above 8,000 ft. today and tonight, free air freezing level 12,000 ft. Monday, then 13,000 ft. Monday night through Tuesday night.
- highs 70-68 warming to 72 Tuesday lows 43-46.
- Mostly sunny and a bit cooler Wednesday, mostly cloudy Wednesday night,
- Mostly sunny and a bit warmer Thursday, mostly cloudy at night,
- Then sunny and a bit warmer Friday and Saturday, mostly clear Friday night,
- free air freezing level 14,000 ft. Wednesday through Thursday, 15,000 ft. Wednesday night, 14,000 ft. Thursday, 15,000 ft. Thursday night and Friday, 16,000 ft. Friday night, then 15,000 ft. Saturday.
- highs 70-82 lows 47-50.
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