Aug
29.
An Upper Level Low Pressure Trough (“U” shape) continues to give us weak onshore airflow to keep us in cooler temperatures for a while, but temperatures will rise when Upper Level High Pressure takes over Tuesday through Thursday. The graphics for days 1-3 show no frontal systems sliding into the Pacific Northwest. The graphics for days 3-7 Tuesday through Saturday show a cold front moving in Monday and next Tuesday.
ADVISORIES:
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 11 AM TUESDAY FOR SOUTHERN DESCHUTES COUNTY.
- AN AIR QUALITY ALERT IS IN EFFECT UNTIL 11 AM TUESDAY FOR KLAMATH COUNTY.
HEALTH ADVISORIES:
- A RECREATIONAL HEALTH ADVISORY IS IN EFFECT DUE TO A FOR THE WILLAMETTE RIVER TO INCLUDE ROSS ISLAND BRIDGE DOWN RIVER TO WAPATO BRIDGE AND KELLY POINT PARK. AREAS OF THE RIVER AFFECTED BY THE ADVISORY ARE IN MULTNOMAH COUNTY. *PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS WHERE BLOOMS ARE PRESENT, AS THE MAJOR ROUTE OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE WILLAMETTE RIVER TO ENJOY ACTIVITIES SUCH AS FISHING, HIKING, BIKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY, WHICH INCREASES THE RISK OF INHALING CYANOTOXINS.
- A RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR ODEL LAKE IN KLAMATH COUNTY DUE TO THE PRESENCE OF MICROCYSTIN.*PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS WHERE BLOOMS ARE PRESENT, AS THE MAJOR ROUT OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT ODEL LAKE TO ENJOY ACTIVITIES SUCH AS FISHING, HIKING, BIKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY, WHICH INCREASES THE RISK OF INHALING MICROCYSTIN.
- A RECREATIONAL HEALTH ADVISORY IS IN EFFECT DUE TO A FOR BROWNLEE RESERVOIR IN BAKER COUNTY DUE TO THE SPREAD OF *PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS WHERE BLOOMS ARE PRESENT, AS THE MAJOR ROUT OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT THE WILLAMETTE RIVER TO ENJOY ACTIVITIES SUCH AS FISHING, HIKING, BIKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY, WHICH INCREASES THE RISK OF INHALING CYANOTOXINS. *
- A RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR ECKMAN LAKE IN LINCOLN COUNTY DUE TO THE PRESENCE OF CYANOBACTERIA.*PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS WHERE BLOOMS ARE PRESENT, AS THE MAJOR ROUT OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT ODEL LAKE TO ENJOY ACTIVITIES SUCH AS FISHING, HIKING, BIKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY, WHICH INCREASES THE RISK OF INHALING SAXITOXIN (PSP).
- A RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR UPPER KLAMATH LAKE IN KLAMATH COUNTY DUE TO THE PRESENCE OF MICROCYSTIN.*PEOPLE SHOULD AVOID SWIMMING AND HIGH-SPEED ACTIVITIES, SUCH AS WATER SKIING OR POWER BOATING, IN AREAS WHERE BLOOMS ARE PRESENT, AS THE MAJOR ROUT OF EXPOSURE IS INGESTION OF WATER. TOXINS ARE NOT ABSORBED THROUGH THE SKIN, HOWEVER THOSE WITH SKIN SENSITIVITIES MAY GET A PUFFY RED RASH. OREGON HEALTH AUTHORITY ENCOURAGES PEOPLE TO VISIT UPPER KLAMATH LAKE TO ENJOY ACTIVITIES SUCH AS FISHING, HIKING, BIKING, PICNICKING, BIRD WATCHING, CANOEING, AND KAYAKING. BOATING IS SAFE AS LONG AS SPEEDS DO NOT CREATE EXCESSIVE WATER SPRAY, WHICH INCREASES THE RISK OF INHALING MICROCYSTIN.
- 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 37 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 41 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 36 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 8.28.25
Data courtesy of Oregon Allergy Associates.
The grass pollen season has just about ended.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- A mix of clouds and sun and a bit warmer today, partly cloudy this evening, clear late tonight,
- Sunny a bit warmer Sunday, mostly clear at night,
- Sunny and a bit warmer Monday (Labor Day), then mostly clear Monday night.
- highs 88-84 warming to 85 Sunday lows 53-56.
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit warmer Wednesday, partly cloudy in the evening, mostly clear late at night,
- Mostly sunny and a bit cooler Thursday, partly cloudy Thursday night,
- Then a mix of clouds and sun and a bit cooler Friday.
- highs 88-93 lows 57-60 (seasonal averages high 82 low 50).
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YOUR SATURDAY COLLEGE FOOTBALL WEATHER FORECAST:
SATURDAY AUGUST 30TH:
Ducks vs. Montana State at Autzen Stadium, Game Time 1:00 pm Forecast: Preliminary forecast: Mostly Sunny 75 degrees, warming to 88 by the end of the game.
Beavers vs. Cal Golden Bears at Reser Stadium, Game Time 7:30 PM- Preliminary forecast: Mostly Clear to Partly Cloudy 75 degrees, then cooling into the 60s as the game progresses.
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy start, mostly cloudy and a bit warmer this afternoon, partly cloudy this evening, mostly clear late tonight,
- Some AM clouds, sunny and a bit warmer Sunday afternoon, mostly clear at night,
- Mostly sunny and a bit warmer Monday (Labor Day), then mostly clear Monday night.
- highs 89-88 warming to 92 Monday lows 57-60.
- Mostly sunny and a bit warmer (HOT) Tuesday, mostly clear Tuesday night,
- Some AM clouds, sunny and a bit warmer (HOT) Wednesday afternoon, partly cloudy in the evening, mostly clear at night,
- Partly cloudy and a bit warmer (HOT) Thursday, partly cloudy Thursday night,
- Mostly cloudy start, then partly cloudy and a bit cooler (still very warm) Friday afternoon.
- highs 97-100 cooling to 93 Friday lows 64-66 to 65 Thursday night.
- (seasonal averages high 84 low 56).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with areas of AM coastal fog while patchy AM inland fog, partly cloudy and a bit warmer this afternoon, partly cloudy tonight,
- AM clouds, sunny and a bit warmer Sunday afternoon, partly cloudy in the evening, mostly cloudy late at night,
- Mostly sunny and a bit warmer Monday (Labor Day), then mostly clear Monday night.
- highs 73-75 lows 54-55.
- Mostly sunny and a bit warmer Tuesday, partly cloudy Tuesday night,
- Partly cloudy and a bit cooler Wednesday and at night,
- Then mostly cloudy and a bit cooler Thursday and Friday, mostly cloudy Thursday night.
- highs 76-73 lows near 56.
- (seasonal averages high 68 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly sunny and a bit warmer with areas of smoke today, mostly cloudy with areas of evening smoke, clear with areas of smoke late tonight,
- Areas of AM smoke, mostly sunny Sunday afternoon, mostly clear at night,
- Sunny and a bit warmer Monday (Labor Day), then mostly clear Monday night.
- free air freezing level 14,000 ft. today through Sunday, then 15,000 ft. Sunday night through Monday night.
- highs 78-82 lows 50- 54.
- Sunny and a bit warmer Tuesday, partly cloudy Tuesday night,
- Mostly sunny Wednesday, partly cloudy in the evening, partly cloudy late at night,
- Mostly sunny Thursday, mostly cloudy in the evening, partly cloudy late Thursday night,
- Then a mix of clouds and sun and a bit cooler Friday.
- free air freezing level 15,000 ft. Tuesday through Friday.
- highs 85-80 lows 57-58 cooling back to 57 Thursday night.
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