Sep
21.
An Upper Level High Pressure Ridge takes over for a warming trend. The graphics for days 1-3 show a pre-Fall cold frontal system that pushed through the Pacific Northwest Sunday. The graphics for days 3-7 Thursday through Monday show a cold front pushing through next Thursday, then another front moving through next Sunday.
Note: Autumn officially begins with the Autumnal Equinox at 11: 19 AM today Monday 9.22.25.
ADVISORIES:
- A FROST ADVISORY IS IN EFFECT UNTIL 8 AM TODAY FOR THE SISKIYOU MOUNTAINS, THE SOUTHERN OREGON CASCADES, AND THE KLAMATH BASIN.
HEALTH ADVISORIES:
- A RECREATIONAL HEALTH ADVISORY IS IN EFFECT DUE TO A FOR WAPATO MARSH AT AT OAKS BOTTOM WILDLIFE REFUGE 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 WAPATO MASRSH 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 UPPER KLAMATH LAKE IN KLAMATH COUNTY E 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 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 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 RECREATIONAL HEALTH ADVISORY IS IN EFFECT FOR HELLS CANYON RESERVOIR IN BAKER AND WALLOWA COUNTIES 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 HELLS CANYON RESERVOIR 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 FOR OCHOCO LAKE IN CROOK 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 OCHOCO 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 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 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 BULLY CREEK RESERVOIR IN MALHEUR 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 BULLY CREEK RESERVOIR 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 FOR THIEF VALLEY RESERVOIR IN BAKER AND UNION COUNTIES 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 THIEF VALLEY RESERVOIR 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 FOR UPPER KLAMATH WILDLIFE REFUGE 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 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 UPPER KLAMATH WILDLIFE REFUGE 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 PRESENCE OF CYANOBACTERIA FOR THE SOUTH UMPQUA RIVER. *PEOPLE SHOULD AVOID POOLS OF WATER IN BEDROCK ALONG THE RIVER. AVOID WATER CONTACT, DO NOT DRINK THE WATER, AND KEEP CHILDREN AND PETS AWAY FROM THE POOLS OF WATER.
- 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 23 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 12 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 23 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 9.16.25
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:
- Sunny and a bit warmer today (11:19 AM Autumnal Equinox-Fall begins), clear tonight,
- Sunny and warmer Tuesday, clear at night,
- Sunny and slightly warmer Wednesday, then mostly clear Wednesday night.
- highs 77-86 warming to 87 Wednesday lows 48-52.
- Sunny and a bit cooler Thursday, mostly clear Thursday night,
- Mostly sunny and a bit cooler Friday, mostly clear in the evening, partly cloudy late at night,
- Mostly sunny Saturday, partly cloudy with a slight (20%) chance of rain Saturday night,
- Then mostly sunny with a slight (20%) chance of rain Sunday.
- highs 82-77 lows 48-50 (seasonal averages high 76 low 47).
_____
YOUR SATURDAY COLLEGE FOOTBALL WEATHER FORECAST:
SATURDAY SEPTEMBER 20TH:
Ducks vs Beavers Rivalry game (formerly known as The Civil War Game) at Autzen Stadium Game Time: 12:00 PM – The Ducks defeated the Beavers soundly 41-7.
SATURDAY SEPTEMBER 27 TH:
Ducks vs Penn State Nittany Lions at West Shore Home Field, University Park , PA – Game Time 4:30 pm PDT; Weather Forecast- Partly cloudy 57 degrees, cooling as the game progresses.
FRIDAY SEPTEMBER 26 TH:
Beavers vs Houston Cougars at Reser Stadium – Game time 7:30 pm PDT: Weather forecast- Mostly Clear 68 degrees, cooling as the game progresses.
___________________
Forecast for the Umpqua Valley including Roseburg:
- Some AM clouds with patchy fog, sunny and warmer this afternoon (11:19 AM Autumnal Equinox-Fall begins), clear tonight,
- Sunny and warmer Tuesday, clear at night,
- Sunny and a bit cooler Wednesday, then mostly clear Wednesday night.
- highs 82-95 cooling to 92 Wednesday lows 50-56.
- Mostly sunny and a bit cooler Thursday, mostly clear Thursday night,
- Mostly sunny and a bit cooler Friday, mostly clear at night,
- Partly cloudy Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
- Then partly cloudy with a slight (20%) chance of showers Sunday.
- highs 85-82 lows 53-54.
- (seasonal averages high 78 low 51).
_______________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Patchy AM fog, sunny and a bit warmer today (11:19 AM Autumnal Equinox-Fall begins), mostly clear tonight,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Mostly sunny and a bit cooler Wednesday, mostly clear in the evening, then partly cloudy with patchy fog late Wednesday night.
- highs 74-77 cooling to 75 Wednesday lows 52-54.
- Partly cloudy with patchy AM fog, sunny and a bit cooler Thursday afternoon, mostly clear Thursday night,
- Partly cloudy Friday, partly cloudy at night,
- Partly cloudy Saturday, partly cloudy with a slight (20%) chance of showers Saturday night,
- Then partly cloudy with a slight (20%) chance of showers Sunday.
- highs near 72 lows near 52. (seasonal averages high 66 low 51)
_______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and warmer today (11:19 AM Autumnal Equinox-Fall begins), mostly clear tonight,
- Sunny and a bit warmer Tuesday, clear at night,
- Sunny and a bit warmer Wednesday, then mostly clear Wednesday night.
- free air freezing level 4,000 ft. rising to 15,000 ft. this afternoon, 16,000 ft. tonight through Tuesday night, then 15,000 ft. Wednesday and Wednesday night.
- highs 70-80 lows 45-50 cooling to 49 Wednesday night.
- Sunny a bit cooler Thursday, mostly clear Thursday night,
- Sunny and a bit cooler Friday, partly cloudy at night,
- Mostly sunny and a bit warmer Saturday, mostly cloudy with a slight (20%) chance of evening rain, partly cloudy with a slight (20%) chance of rain late Saturday night,
- Then mostly sunny and a bit cooler with a slight (20%) chance of rain Sunday.
- free air freezing level 15,000 ft. Thursday through Friday, 14,000 ft. Friday night, 12,000 ft. Saturday, snow level above 8,000 ft. Saturday night and Sunday.
- highs 74-68 warming to 69 Saturday cooling to 66 Sunday lows 45-44.
______