Aug
31.
An Upper Level Low Pressure Trough (“U” shape) continues to give us weak onshore airflow to keep us in cooler temperatures for another day, but temperatures will rise as 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 Wednesday through Sunday show a cold front moving in Wednesday.
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 55 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 48 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 42 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:Mostly clear tonight,
- Mostly clear tonight,
- Patchy AM fog, mostly sunny and slightly cooler Monday (Labor Day), mostly clear Monday night,
- Sunny and a bit warmer (HOT) Tuesday, partly cloudy at night,
- Mostly sunny and HOT Wednesday, then partly cloudy Wednesday night.
- lows 54-59 highs 85-92.
- Mostly sunny and (HOT) Thursday, partly cloudy Thursday night,
- A mix of clouds and sun and a bit cooler Friday, partly cloudy at night,
- Mostly sunny and a bit cooler Saturday, partly cloudy Saturday night,
- Then a mix of clouds and sun and a bit cooler Sunday.
- highs 92-85 lows 59-56 (seasonal averages high 82 low 50).
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YOUR SATURDAY COLLEGE FOOTBALL WEATHER FORECAST:
SATURDAY AUGUST 30TH:
Ducks vs. Montana State Bobcats at Autzen Stadium, Game Time 1:00 pm Ducks clobbered Montana State 59-13.
Beavers vs. Cal Golden Bears at Reser Stadium, Game Time 7:30 PM- The Beavers lost to the Cal Bears 35-15.
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Forecast for the Umpqua Valley including Roseburg:
- Mostly clear tonight,
- Some AM clouds, sunny and a bit cooler Monday afternoon (Labor Day), clear Monday night,
- Sunny and warmer (HOT) Tuesday, partly cloudy at night,
- Partly cloudy and a bit cooler (HOT) Wednesday, partly cloudy Wednesday night.
- lows 55-58 highs 86-94 cooling to 93 Wednesday.
- Partly cloudy and a bit warmer (HOT) Thursday, partly cloudy Thursday night,
- Partly cloudy and a bit cooler (HOT) Friday, partly cloudy at night,
- Partly cloudy and a bit cooler (still very warm) Saturday, partly cloudy Saturday night,
- Mostly cloudy start, then partly cloudy and a bit cooler Sunday afternoon.
- highs 95-87 lows 63-60.
- (seasonal averages high 84 low 55).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this evening, mostly cloudy late tonight,
- AM clouds, sunny and a bit warmer Monday afternoon (Labor Day), mostly clear in the evening, partly cloudy late Monday night,
- Some AM clouds, sunny and a bit cooler Tuesday, partly cloudy in the evening, mostly cloudy late at night,
- Mostly cloudy and a bit cooler Wednesday, then mostly cloudy Wednesday night.
- lows 57-55 warming back to 57 Tuesday night and Wednesday night highs 73-74 cooling back to 73 Wednesday.
- Mostly cloudy and a bit cooler Thursday and Friday, mostly cloudy both nights,
- Mostly cloudy and a bit cooler Saturday, mostly cloudy at night,
- Then mostly cloudy Sunday.
- highs 74-73 warming back to 74 Saturday and Sunday lows 57-55.
- (seasonal averages high 68 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear with areas of smoke late tonight,
- Sunny and a bit warmer with areas of smoke Monday (Labor Day), mostly clear with areas of smoke Monday night,
- Sunny and a bit warmer Tuesday, mostly cloudy with a slight (20%) chance of thunderstorms at night,
- Mostly sunny and a bit cooler with a slight (20%) chance of thunderstorms Wednesday, then partly cloudy with a slight (20%) chance of thunderstorms Wednesday night.
- free air freezing level 14,000 ft. tonight and Monday, 15,000 ft. Monday night and Tuesday, 15,000 ft. falling to 14,000 ft. Tuesday night, then 14,000 ft. Wednesday and Wednesday night.
- lows 49-57 cooling to 55 Wednesday night highs 79-84 cooling to 82 Wednesday.
- Mostly sunny and a bit cooler Thursday, partly cloudy Thursday night,
- A mix of clouds and sun and a bit cooler Friday, mostly cloudy in the evening, partly cloudy late at night,
- Mostly sunny and a bit cooler with a slight (20%) chance of showers Saturday, partly cloudy Saturday night,
- Then mostly sunny and a bit cooler Sunday.
- free air freezing level 15,000 ft. Thursday and Thursday night, 14,000 ft. Friday and Friday night, snow level above 8,000 ft. Saturday, free air freezing level 14,000 ft. Saturday night, then 13,000 ft. Sunday.
- highs 82-72 lows 54-50.
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