Aug
16.
An Upper Level Low Pressure Trough (“U”Shape) moves through overnight and early this AM. Then an Upper Level High Pressure Ridge takes over bringing sunshine and warmer temperatures.The graphics for days 1-3 show a cold frontal system moving through the Pacific Northwest today. The graphics for days 3-7 Tuesday through Saturday show a cold front moving through Tuesday and Wednesday.
ADVISORIES:
- A FLASH FLOOD WATCH IS IN EFFECT THROUGH THIS EVENING FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON, JOHN DAY BASIN, OCHOCO, AND THE JOHN DAY HIGHLANDS.
- A FLASH FLOOD WATCH IS IN EFFECT THROUGH THROUGH SUNDAY EVENING 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 23 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 21 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:
- Partly cloudy this evening, mostly cloudy late tonight,
- A mix of clouds and sun and a bit warmer Sunday, mostly cloudy Sunday night,
- AM clouds and sun, sunny Monday afternoon, mostly clear at night,
- Sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- lows 55-52 warming to 54 Tuesday highs 80-84.
- Sunny and a bit warmer Wednesday and Thursday, clear both nights,
- Sunny and a bit warmer Friday, clear Friday night,
- Then sunny Saturday.
- highs 86-92 lows near 55. (seasonal averages high 84 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy through late evening, mostly cloudy late tonight,
- Some AM clouds, sunny and a bit warmer Sunday afternoon, partly cloudy Sunday night,
- Some AM clouds, sunny Monday afternoon, clear at night,
- Mostly sunny and a bit warmer Tuesday, then clear Tuesday night.
- lows 59-55 warming to 58 Tuesday night highs 83-85.
- Sunny and a bit warmer Wednesday, clear Wednesday night,
- Sunny and a bit warmer Thursday and Friday, clear both nights,
- Then sunny Saturday.
- 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:
- Partly cloudy this evening, mostly cloudy with patchy fog late tonight,
- AM clouds with patchy fog, partly cloudy and a bit warmer Sunday afternoon, mostly cloudy in the evening, partly cloudy with patchy fog late Sunday night,
- Some AM clouds with patchy fog, sunny Monday afternoon, mostly clear at night,
- Mostly sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- lows 56-53 warming back to 56 Tuesday night highs 73-74.
- Mostly sunny and a bit cooler Wednesday, clear Wednesday night,
- Sunny and a bit warmer Thursday, clear at night,
- Sunny and a bit cooler Friday, clear Friday night,
- Then sunny Saturday.
- 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,
- Mostly sunny and a bit warmer Sunday, mostly cloudy with a slight (20%) chance of evening showers, just mostly cloudy Sunday night,
- AM clouds and sun, sunny Monday afternoon, mostly clear at night,
- Sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- free air freezing level 13,000 ft. tonight and Sunday, snow level above 8,000 ft. Sunday night, free air freezing level 13,000 ft. rising to 14,000 ft. Monday, then 14,000 ft. Monday night through Tuesday night.
- lows 45-47 cooling to 45 Monday night warming to 46 Tuesday night highs 72-70 warming to 73 Tuesday.
- Sunny and a bit warmer Wednesday and Thursday, clear both nights,
- Sunny and a bit warmer Friday, clear Friday night,
- Then sunny Saturday.
- free air freezing level 13,000 ft. Wednesday, 15,000 ft. Wednesday night and Thursday, then 16,000 ft. Thursday through Saturday.
- 73-84 cooling to 82 Saturday lows 47-53.
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