Aug
17.
An Upper Level High Pressure Ridge takes over bringing sunshine and warmer temperatures. The graphics for days 1-3 show a cold frontal system offshore Tuesday. The graphics for days 3-7 Wednesday through Sunday show no frontal activity moving toward the coast or through the Pacific Northwest through the period.
ADVISORIES:
- A FLASH FLOOD WATCH IS IN EFFECT UNTIL MIDNIGHT MDT TONIGHT FOR HARNEY COUNTY, BAKER COUNTY, MALHEUR COUNTY, AND THE OREGON LOWER TREASURE VALLEY.
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 21 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 16 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 19 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: 2 LOW
TREES: 0 ABSENT
WEEDS: 0 ABSENT
Measured 8.14.25
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 cloudy tonight,
- AM clouds and sun, sunny and a bit warmer Monday afternoon, mostly clear Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny and a bit cooler Wednesday, then clear Wednesday night,
- lows 56-52 warming to 54 Tuesday night and Wednesday night highs 79-85.
- Sunny and warmer Thursday, clear Thursday night,
- Sunny and a bit warmer Friday, clear at night,
- Then sunny and a bit cooler Saturday and Sunday, clear Saturday night.
- highs 89-93 cooling to 91 Sunday lows 56-57. (seasonal averages high 84 low 51).
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Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy this evening, partly cloudy late tonight,
- Some AM clouds, sunny and a bit warmer Monday afternoon, clear Monday night,
- Sunny and a bit warmer Tuesday, clear at night,
- Sunny and a bit warmer Wednesday, then clear Wednesday night.
- lows 58-55 warming back to 58 Tuesday night highs 83-85.
- Sunny and a bit warmer Thursday and Friday, clear both nights,
- Sunny and a bit warmer Saturday, clear Saturday night,
- Then sunny and a bit cooler Sunday.
- highs near 87-93 lows 59-60. (seasonal averages high 86 low 57).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy this evening, partly cloudy with patchy coastal fog late tonight,
- Some AM clouds with patchy coastal fog, sunny and a bit cooler Monday afternoon, mostly clear Monday night,
- Mostly sunny and a bit warmer Tuesday, mostly clear in the evening, partly cloudy late at night,
- Mostly sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- lows 54-53 warming to 56 Tuesday night highs 73-74.
- Mostly sunny Thursday, mostly clear Thursday night,
- Mostly sunny and a bit cooler Friday, mostly clear at night,
- Mostly sunny Saturday, partly cloudy Saturday night,
- Then partly cloudy Sunday.
- highs 73-75 cooling to 74 Friday and Saturday lows near 54.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy tonight,
- AM clouds and sun, sunny and a bit warmer Monday afternoon, mostly clear Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny and a bit cooler Wednesday, then clear Wednesday night.
- free air freezing level 13,000 ft. tonight. 13,000 ft. rising to 14,000 ft. Monday, 14,000 ft. Monday night, 14,000 ft. Tuesday, 13,000 ft. Tuesday night and Wednesday, then 14,000 ft. Wednesday.
- lows 47-45 warming back to 47 Wednesday night highs 70-74 cooling to 73 Wednesday.
- Sunny and warmer Thursday, clear Thursday night,
- Sunny and a bit warmer Friday, mostly clear at night,
- Then sunny and a bit cooler Saturday and Sunday, mostly clear Saturday night.
- free air freezing level 13,000 ft. Wednesday, 15,000 ft. Wednesday night and Thursday, then 16,000 ft. Thursday through Saturday night, then 15,000 ft. Sunday.
- 82-87 cooling to 83 Sunday lows 53-56 cooling to 54 Sunday.
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