Aug
30.
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 Tuesday and 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 379in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 78 in the Moderate 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:
- Partly cloudy this evening, clear late tonight,
- Sunny a bit warmer Sunday, mostly clear Sunday night,
- Sunny and a bit warmer Monday (Labor Day), mostly clear at night,
- Sunny and a bit warmer Tuesday, mostly clear evening, partly cloudy late Tuesday night.
- lows 53-56 highs 88-84 warming to 85 Sunday.
- Mostly sunny and a bit warmer Wednesday, partly cloudy in the evening, mostly clear late Wednesday night,
- Mostly sunny and a bit cooler Thursday, partly cloudy at night,
- A mix of clouds and sun and a bit cooler Friday, partly cloudy Friday night,
- Then mostly sunny Saturday.
- 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 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- 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 this evening, mostly clear late tonight,
- Some AM clouds, sunny Sunday afternoon, mostly clear Sunday night,
- Some AM clouds, sunny and a bit cooler Monday (Labor Day), clear at night,
- Sunny and warmer (HOT) Tuesday, then partly cloudy Tuesday night.
- lows 55-58 highs 90-87 warming to 98 Tuesday.
- Partly cloudy and a bit warmer (HOT) Wednesday, partly cloudy in the evening, mostly clear Wednesday night,
- Partly cloudy and a bit warmer (HOT) Thursday, partly cloudy at night,
- Partly cloudy (HOT) Friday,
- Partly cloudy and a bit cooler (still very warm) Saturday.
- highs 99-97 lows 62-57.
- (seasonal averages high 84 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 cooler Sunday afternoon, partly cloudy in the evening, mostly cloudy late Sunday night,
- Mostly sunny and a bit warmer Monday (Labor Day), mostly clear at night,
- Mostly sunny and a bit cooler Tuesday, then partly cloudy Tuesday night.
- lows 55-53 highs 66-69 cooling to 68 Tuesday.
- Partly cloudy and a bit cooler Wednesday and Wednesday night,
- Mostly cloudy and a bit cooler Thursday and Friday, mostly cloudy both nights,
- Partly cloudy and a bit cooler Saturday.
- highs 67-66 warming to 68 Friday cooling to 66 Saturday lows 57-55.
- (seasonal averages high 68 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy and hazy with areas of evening smoke, clear and hazy with areas of smoke late tonight,
- Sunny and hazy with areas of smoke Sunday, mostly clear with areas of smoke Sunday night,
- Sunny and a bit warmer Monday (Labor Day), mostly clear Monday night,
- Sunny and a bit warmer Tuesday, then partly cloudy with a slight (20%) chance of thunderstorms Tuesday night.
- free air freezing level 14,000 ft. tonight through Sunday night, 15,000 ft. Monday through Tuesday night.
- lows 50- 54 highs 78-82.
- Mostly sunny with a slight (20%) chance of thunderstorms Wednesday, partly cloudy with a slight (20%) chance of thunderstorms Wednesday night,
- Mostly sunny Thursday, mostly cloudy in the evening, partly cloudy late at night,
- A mix of clouds and sun and a bit cooler Friday, mostly cloudy in the evening, partly cloudy late Friday night,
- Then mostly sunny Saturday.
- free air freezing level 14,000 ft. Wednesday and Wednesday night, 15,000 ft. Thursday and Thursday night, then 14,000 ft. Friday through Saturday.
- highs 85-80 lows 57-58 cooling back to 57 Thursday night.
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