Aug
31.
An Upper Level Low Pressure Trough (“U” shape) continues to give us weak onshore airflow to keep us in cooler temperatures for today, 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 Thursday through Monday show a cold front moving in between Friday and Saturday.
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.
- AN EXTREME HEAT WATCH IS IN EFFECT FROM TUESDAY MORNING THROUGH THURSDAY EVENING FOR THUNDERSTORMS AND UNSTABLE CONDITIONS FOR THE KLAMATH BASIN AND THE FREMONTTHE EASTERN COLUMBIA RIVER GORGE OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
- A FIRE WEATHER WATCH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR THUNDERSTORMS AND UNSTABLE CONDITIONS FOR THE NORTHERN WILLAMETTE NATIONAL FOREST AND THE SOUTHERN WILLAMETTE NATIONAL FOREST.
- A FIRE WEATHER WATCH IS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE UMPQUA NATIONAL FOREST, THE SISKIYOU MOUNTAINS, THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN AND THE FREMONT-WINEMA NATIONAL FOREST.
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 29 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 34 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 31 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,
- Patchy AM fog, mostly sunny and slightly cooler today (Labor Day), mostly clear tonight,
- Sunny and a bit warmer (HOT) Tuesday, partly cloudy at night,
- Mostly sunny and HOT Wednesday, then partly cloudy Wednesday night.
- highs 85-92 lows 54-59.
- 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:
- Some AM clouds, sunny and a bit cooler this afternoon (Labor Day), clear tonight,
- Sunny and warmer (HOT) Tuesday, partly cloudy at night,
- Partly cloudy and a bit cooler (HOT) Wednesday, partly cloudy Wednesday night.
- highs 86-94 cooling to 93 Wednesday lows 59-63.
- 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:
- AM clouds, sunny and a bit warmer this afternoon (Labor Day), mostly clear this evening, partly cloudy late tonight,
- 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.
- highs 73-74 cooling back to 73 Wednesday lows 55-57.
- 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 67 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit warmer with areas of smoke today (Labor Day), mostly clear with areas of smoke tonight,
- 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. today, 15,000 ft. tonight and Tuesday, 15,000 ft. falling to 14,000 ft. Tuesday night, then 14,000 ft. Wednesday and Wednesday night.
- highs 79-84 cooling to 82 Wednesday lows 52-57 cooling to 55 Wednesday night.
- 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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