Aug
22.
An Upper Level High Pressure Ridge formed a heat dome over the Pacific Northwest. 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 between Thursday and Friday and another one is stretched along the West Coast next Saturday.
ADVISORIES:
- AN OZONE ADVISORY IS IN EFFECT FOR THE EUGENE/SPRINGFIELD METRO AREA STARTING TODAY UNTIL 10 PM MONDAY DUE TO ELEVATED LEVELS OF OZONE POLLUTION (SMOG).
- AN AIR QUALITY ADVISORY IS IN EFFECT FROM 10 AM TODAY 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 9 PM MONDAY FOR CROOK, DESCHUTES, JEFFERSON, AND WESTERN CROOK COUNTIES OF OREGON.
- 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 FROM NOON TODAY 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.
- 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 THE SOUTH CENTRAL OREGON CASCADES, THE KLAMATH BASIN, NORTHERN AND EASTERN KLAMATH COUNTY, AND WESTERN, CENTRAL AND EASTERN LAKE COUNTY.
- A HEAT ADVISORY IS IN EFFECT UNTIL 8 PM SUNDAY FOR CENTRAL DOUGLAS COUNTY, AND EASTERN DOUGLAS FOOTHILLS.
- A HEAT ADVISORY IS IN EFFECT FROM NOON TODAY UNTIL 9 PM WEDNESDAY FOR THE GRANDE RONDE VALLEY, JOHN DAY BASIN, AND CENTRAL OREGON.
- A HEAT ADVISORY IS IN EFFECT FROM NOON TODAY UNTIL 9 PM SUNDAY 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.
_______________
Air Quality Index:
Eugene/Springfield: The Air Quality Index is 53 in the Moderate category measuring Particulate Matter.
Oakridge: The Air Quality Index is 39 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 50 in the Good category measuring Particulate Matter.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
_______________
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.
_______________
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Mostly sunny and a bit warmer, (HOT), today, partly cloudy tonight,
- Mostly sunny and a bit cooler,(HOT), Sunday, partly cloudy at night,
- Mostly sunny and a bit cooler,(HOT), Monday, then partly cloudy Monday night.
- highs 98-95 lows 60-62.
- Sunny and (HOT) Tuesday, partly cloudy Tuesday night,
- Mostly sunny and a bit cooler,(HOT), Wednesday, partly cloudy at night,
- Then mostly sunny and a bit cooler Thursday and Friday, partly cloudy Thursday night.
- highs 95-85 lows 62-56. (seasonal averages high 83 low 51).
Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy and slightly warmer, (Hot), today, partly cloudy tonight,
- Some AM clouds, sunny and a bit cooler (Hot), Sunday afternoon, partly cloudy at night,
- Some AM clouds, sunny (Hot), Monday afternoon, then mostly clear Monday night.
- highs 101-97 lows 65-64 warming back to 65 Monday night.
- Some AM clouds, sunny and a bit cooler Tuesday, partly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy late Tuesday night,
- Partly cloudy and a bit cooler Wednesday, partly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy late at night,
- Then partly cloudy and a bit cooler Thursday and Friday, partly cloudy Thursday night.
- highs 96-88 lows 66-62.
- (seasonal averages high 85 low 56).
_______________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy and warmer this afternoon, mostly cloudy tonight,
- Mostly cloudy start, partly cloudy and a bit cooler Sunday afternoon, mostly cloudy at night,
- AM clouds, sunny and a bit cooler Monday afternoon, partly cloudy in the evening, then mostly cloudy Monday night.
- highs 78-76 lows 57-59.
- AM clouds, sunny Tuesday, mostly cloudy Tuesday night,
- Mostly cloudy and a bit cooler Wednesday, partly cloudy in the evening, mostly cloudy late at night,
- AM clouds, partly cloudy and a bit warmer Thursday afternoon, mostly cloudy Thursday night,
- Then mostly cloudy Friday.
- highs 76-75 warming back to 76 Thursday and Friday lows 58-57.
- (seasonal averages high 67 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly sunny, (Warm), today, partly cloudy tonight,
- Mostly sunny and a bit cooler Sunday, mostly cloudy at night,
- Mostly sunny and a bit cooler Monday, mostly cloudy in the evening, then partly cloudy late Monday night.
- free air freezing level 15,000 ft. today and tonight, then 15,000 ft. Sunday through Monday night.
- highs 89-83 lows 60-58.
- Mostly sunny and a bit cooler Tuesday, mostly cloudy in the evening, partly cloudy late Tuesday night,
- Mostly sunny and a bit cooler with a slight (20%) chance of thunderstorms Wednesday ,partly cloudy with a slight (20%) chance of thunderstorms at night,
- Then mostly sunny and a bit cooler Thursday and Friday, partly cloudy Thursday night,
- free air freezing level 15,000 ft. Tuesday through Wednesday, snow level above 8,000 ft. Wednesday night, then free air freezing level 14,000 ft. Thursday through Friday.
- highs 82-72 lows 58-52.
______