Aug
24.
An Upper Level High Pressure Ridge that formed a heat dome over the Pacific Northwest still keeps us hot. 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 between Thursday and Friday and another one is stretched offshore next Saturday.
ADVISORIES:
- AN OZONE ADVISORY IS IN EFFECT FOR THE EUGENE/SPRINGFIELD METRO AREA UNTIL 10 PM MONDAY DUE TO ELEVATED LEVELS OF OZONE POLLUTION (SMOG).
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 8 PM MONDAY FOR THE TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, INNER PORTLAND METRO, WEST CENTRAL WILLAMETTE VALLEY, EAST CENTRAL WILLAMETTE VALLEY, BENTON COUNTY LOWLANDS, LINN COUNTY LOWLANDS, AND THE LANE COUNTY LOWLANDS, THE LANE COUNTY CASCADE FOOTHILLS, AND THE CASCADES OF LANE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 8 PM MONDAY FOR THE LANE COUNTY CASCADE FOOTHILLS AND THE CASCADES OF LANE COUNTY.
- AN AIR QUALITY ADVISORY IS IN EFFECT UNTIL 9 PM MONDAY FOR CROOK, DESCHUTES, JEFFERSON, AND WESTERN CROOK COUNTIES OF OREGON.
- A RED FLAG WARNING IS IN EFFECT UNTIL 9 PM MONDAY FOR HOT, DRY, AND UNSTABLE CONDITIONS FOR THE CENTRAL MOUNTAINS OF OREGON AND NORTHERN DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT UNTIL 9 PM TONIGHT FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SISKIYOU MOUNTAINS, THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 9 PM MONDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SISKIYOU MOUNTAINS, THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 9 PM MONDAY FOR THE UMPQUA NATIONAL FOREST, THE WESTERN ROGUE BASIN INCLUDING THE ILLINOIS VALLEY, AND THE EASTERN ROGUE VALLEY.
- AN EXTREME HEAT WARNING IS IN EFFECT UNTIL 11 PM TUESDAY FOR LOWER COLUMBIA RIVER, TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, INNER PORTLAND METRO, EAST PORTLAND METRO, OUTER SOUTHEAST PORTLAND METRO, WEST CENTRAL WILLAMETTE VALLEY, BENTON COUNTY LOWLANDS, LINN COUNTY LOWLANDS, LANE COUNTY LOWLANDS, WEST COLUMBIA RIVER GORGE I-84 CORRIDOR, UPPER HOOD RIVER VALLEY, AND THE CENTRAL COLUMBIA RIVER GORGE I-84 CORRIDOR, CLACKAMAS COUNTY CASCADE FOOTHILLS, CASCADE FOOTHILLS OF LINN AND MARION COUNTIES, AND THE LANE COUNTY CASCADE FOOTHILLS.
- AN EXTREME HEAT WARNING IS IN EFFECT UNTIL 9 PM WEDNESDAY FOR THE 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.
- AN EXTREME HEAT WARNING IS IN EFFECT UNTIL 8 PM MONDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 5 AM TUESDAY FOR NORTHERN OREGON COAST RANGE LOWLANDS, CENTRAL OREGON COAST RANGE LOWLANDS, NORTH OREGON CASCADES, CASCADES OF MARION AND LINN COUNTIES, AND THE CASCADES OF LANE COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 5 AM MONDAY FOR THE NORTH OREGON COAST RANGE AND THE CENTRAL OREGON COAST RANGE.
- A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM TONIGHT FOR CENTRAL DOUGLAS COUNTY, AND EASTERN DOUGLAS FOOTHILLS.
- A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM WEDNESDAY FOR THE GRANDE RONDE VALLEY, JOHN DAY BASIN, AND CENTRAL OREGON.
- A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM TONIGHT FOR WALLOWA COUNTY AND THE EAST SLOPES OF THE OREGON CASCADES.
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 59 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 69 in the Moderate category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 59 in the Moderate category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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Eugene-Springfield Area Pollen count:
GRASS: 0 ABSENT
TREES: 0 ABSENT
WEEDS: 0 ABSENT
Measured 8.21.25
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:
- Partly cloudy tonight,
- Mostly sunny and HOT Monday, partly cloudy Monday night,
- Mostly sunny and a bit cooler, (still HOT), Tuesday, mostly cloudy at night,
- A mix of clouds and sun and a bit cooler Wednesday, then partly cloudy Wednesday night.
- lows 62-56 highs 95-86
- Mostly sunny Thursday, partly cloudy in the evening, mostly cloudy late Thursday night,
- A mix of clouds and sun and a bit cooler Friday, partly cloudy at night,
- Then mostly sunny and a bit warmer Saturday and Sunday, partly cloudy Saturday night.
- highs 86-84 warming back to 86 Sunday lows 56-55 warming back to 56 Saturday night. (seasonal averages high 83 low 51).
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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: Sunny 79 degrees warming to 85 by the end of the game.
SATURDAY SEPTEMBER 6TH:
Beavers vs. Fresno State Bull Dogs at Reser Stadium, Game Time 12:30 PM- Too early for a preliminary weather forecast.
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy with a slight (20%) chance of evening thunderstorms, partly cloudy tonight,
- Partly cloudy and a bit cooler, (still Hot), Monday afternoon, partly cloudy with a slight (20%) chance of evening thunderstorms, becoming mostly clear late Monday night,
- Partly cloudy and a bit cooler, (still Very Warm), with a slight (20%) chance of thunderstorms Tuesday afternoon, mostly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy late at night,
- Partly cloudy and a bit cooler with a slight (20%) chance of thunderstorms Wednesday afternoon, then party cloudy Wednesday night.
- lows 65-60 highs 96-90.
- Partly cloudy and a bit cooler Thursday and Friday, partly cloudy both nights,
- Then partly cloudy and a bit warmer Saturday through Sunday.
- highs 89-86 warming to 88 Saturday and Sunday lows 62-59 warming to 60 Saturday night.
- (seasonal averages high 85 low 56).
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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, partly cloudy in the evening, mostly cloudy Monday night,
- AM clouds, partly cloudy Tuesday, mostly cloudy at the shore while partly cloudy inland with a slight (20%) chance of evening thunderstorms, just mostly cloudy late at night,
- Partly cloudy and a bit cooler Wednesday, then partly cloudy Wednesday night.
- lows 58-55 highs 75-74.
- Mostly cloudy and a bit warmer Thursday, mostly cloudy Thursday night,
- Mostly cloudy and a bit warmer Friday, partly cloudy at night,
- Partly cloudy and a bit warmer Saturday, mostly cloudy Saturday night,
- The partly cloudy Sunday.
- highs 75-77 lows near 56.
- (seasonal averages high 68 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy and hazy with a slight (20%) chance of evening thunderstorms, partly cloudy and hazy with areas of smoke late tonight,
- Mostly sunny and hazy and a bit cooler with a slight (20%) chance of thunderstorms Monday afternoon, mostly cloudy and hazy with smoke and a slight (20%) chance of evening thunderstorms, mostly cloudy with areas of smoke late at night,
- Mostly sunny and a bit cooler with a slight (20%) chance of showers Tuesday, mostly cloudy with a slight (20%) chance of evening showers, just partly cloudy late Tuesday night,
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of thunderstorms Wednesday, mostly cloudy with a slight (20%) chance of evening showers, then partly cloudy with a slight (20%) chance of showers Wednesday night.
- free air freezing level 15,000 ft. tonight, 14,000 ft. Monday through Tuesday, snow level above 8,000 ft. Tuesday night, free air freezing level 13,000 ft Wednesday, then snow level above 8 ,000 ft. Wednesday night.
- lows 59-52 highs 82-75.
- Mostly sunny and a bit cooler Thursday and Friday, partly cloudy both nights,
- Then mostly cloudy and a bit warmer Saturday and Sunday, partly cloudy Saturday night.
- free air freezing level 14,000 ft. Thursday and Thursday night, 13,000 ft. Friday through Saturday night, then 14,000 ft. Sunday.
- highs 74-70 warming back to 74 Sunday lows 50-47 warming to 49 Saturday night.
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