Aug
05.
An Upper Level Low Pressure Trough (“U “Shape) keeps up the onshore airflow to control temperatures. The graphics for days 1-3 show a cold frontal system moving through the Pacific Northwest Wednesday. The graphics for days 3-7 Friday through Tuesday show no frontal systems on the way to Oregon through the period.
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ADVISORIES:
- A RED FLAG WARNING IS IN EFFECT UNTIL 8 PM TONIGHT FOR WIND AND LOW RELATIVE HUMIDITY FOR THE WARM SPRINGS RESERVATION.
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 26 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 18 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 22 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:
- Partly cloudy this evening, mostly cloudy with a slight (20%) chance of rain late tonight,
- Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler Wednesday afternoon, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
- Mostly sunny and a bit warmer Thursday, mostly clear late at night,
- Sunny and a bit warmer Friday, then mostly clear Friday night.
- lows 59-50 warming to 55 Friday night highs 80-85.
- Mostly sunny and a bit warmer Saturday, partly cloudy in the evening, mostly clear Saturday night,
- Sunny and a bit warmer (Hot) Sunday and Monday, clear both nights,
- Then sunny and a bit cooler (still very warm) Tuesday.
- highs 89-99 cooling to 94 Tuesday lows 58-62 cooling to 59 Tuesday. (seasonal averages high 86 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy this evening, becoming mostly cloudy with patchy fog and a slight (20%) chance of showers late tonight,
- Partly cloudy with a slight (20%) chance of AM showers, just partly cloudy Wednesday afternoon, mostly cloudy with a slight (20%) chance of showers Wednesday night and patchy fog late Wednesday night,
- Mostly cloudy with patchy AM fog, sunny Thursday afternoon, mostly clear at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- lows 60-63 cooling to 56 Friday night highs 85-89.
- Mostly sunny and a bit warmer Saturday, mostly clear Saturday night,
- Mostly sunny and a bit warmer (Hot) Sunday, clear at night,
- Sunny and a bit warmer (Hot) Monday, clear Monday night,
- Then sunny and a bit cooler (still Hot)|Tuesday.
- 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:
- 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 patchy AM fog and a slight (20%) chance of coastal showers while mostly cloudy with patchy fog and a slight (20%) chance of inland AM showers, partly cloudy and a bit warmer Wednesday afternoon, patchy evening coastal fog and a slight (20%) chance of coastal showers with areas of coastal fog late Wednesday night while mostly cloudy with a slight (20%) chance of inland showers and patchy fog late Wednesday night,
- Mostly cloudy with patchy AM fog, sunny and a bit cooler Thursday afternoon, partly cloudy at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- lows 59-54 highs near 74.
- Partly cloudy Saturday and Saturday night,
- Mostly sunny and a bit warmer Sunday, mostly clear at night,
- Mostly sunny and a bit warmer Monday, partly cloudy Monday night,
- Then partly cloudy and a bit cooler Tuesday.
- highs near 76 lows near 57.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Partly cloudy this evening, mostly cloudy late tonight,
- A mix of clouds and sun and a bit cooler Wednesday, mostly cloudy with a (40%) chance of evening showers, a slight (20%) chance of showers late Wednesday night,
- Mostly cloudy with a slight (20%) chance of AM showers, sunny and a bit cooler Thursday, partly cloudy in the evening, mostly clear late at night,
- Sunny and a bit warmer Friday, mostly clear Friday night.
- free air freezing level 13,000 ft. tonight, 12,000 ft. Wednesday, snow level above 8,000 ft. Wednesday night, 8,000 ft. Thursday, free air freezing level 13,000 ft. rising to 14,000 ft. Friday afternoon, then 16,000 ft. Friday night.
- lows 46-48 cooling t0 44 Thursday night highs 70-68 warming back to 70 Thursday.
- Sunny and a bit warmer Saturday, partly cloudy in the evening, mostly clear late Saturday night,
- Sunny and a bit warmer Sunday and Monday, mostly clear both nights,
- Then sunny and a bit cooler Tuesday.
- free air freezing level 16,000 ft. Saturday, above 16,000 ft. Saturday night through Sunday night, then 16,000 ft. Monday through Tuesday.
- highs 77-85 lows 50-55.
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