Aug
09.
An Upper Level High Pressure Ridge (“Arch “Shape) cranks up the heat big time. The graphics for days 1-3 show no frontal systems moving through the Pacific Northwest. The graphics for days 3-7 Wednesday through Sunday show no frontal systems on the way to Oregon until a cold front moves through on Thursday and then another cold front pushes through next Sunday.
ADVISORIES:
- A RED FLAG WARNING IS IN EFFECT FOR STRONG GUSTY WIND AND LOW RELATIVE HUMIDITY UNTIL 9 AM TODAY FOR THE SOUTHERN OREGON COAST.
- AN EXTREME HEAT WARNING IS IN EFFECT FROM NOON TODAY UNTIL 10 PM TUESDAY FOR TUALATIN VALLEY, PORTLAND WEST HILLS AND CHEHALEM MOUNTAIN, INNER PORTLAND METRO, EAST PORTLAND METRO, OUTER SOUTHEAST PORTLAND METRO, WEST CENTRAL WILLAMETTE VALLEY, EAST CENTRAL WILLAMETTE VALLEY, BENTON COUNTY LOWLANDS, LINN COUNTY LOWLANDS, LANE COUNTY LOWLANDS, WEST COLUMBIA RIVER GORGE I-84 CORRIDOR, UPPER HOOD RIVER VALLEY, AND CENTRAL COLUMBIA RIVER GORGE I-84 CORRIDOR.
- A HEAT ADVISORY IS IN EFFECT FROM 8 AM TODAY UNTIL 2 AM WEDNESDAY FOR CENTRAL DOUGLAS COUNTY.
- AN EXTREME HEAT WARNING IS IN EFFECT FROM 8 AM TODAY UNTIL 2 AM TUESDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN EXTREME HEAT WARNING IS IN EFFECT FROM NOON TODAY UNTIL 10 PM TUESDAY NIGHT FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON, THE LOWER COLUMBIA BASIN OF OREGON, AND THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON.
- AN EXTREME HEAT WARNING IS IN EFFECT FROM NOON TODAY UNTIL 10 PM TUESDAY FOR THE JOHN DAY BASIN, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, NORTH CENTRAL OREGON, AND CENTRAL OREGON.
- A HEAT ADVISORY IS IN EFFECT FROM NOON TODAY UNTIL 11 PM MONDAY FOR THE NORTH OREGON COAST RANGE LOWLANDS, THE CENTRAL OREGON COAST RANGE HIGHLANDS, AND THE LOWER COLUMBIA RIVER.
- A HEAT ADVISORY IS IN EFFECT FROM 8 AM TODAY UNTIL 2 AM WEDNESDAY FOR CENTRAL DOUGLAS COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM 11 AM MONDAY UNTIL 2AM TUESDAY FOR THE KLAMATH BASIN.
HEALTH ADVISORIES:
- 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 34 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 22 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 32 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: 3 LOW
TREES: 0 ABSENT
WEEDS: 0 ABSENT
Measured 8.7.25
Data courtesy of Oregon Allergy Associates.
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Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Sunny and warmer (Hot) today, clear tonight,
- Sunny and a bit warmer (Hot ) Monday, clear at night,
- Sunny and a bit cooler (still very warm) Tuesday, mostly clear Tuesday night.
- highs 100-101 cooling to 95 Tuesday lows 64-57.
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Mostly sunny and a bit cooler Thursday, partly cloudy at night,
- Mostly sunny Friday, partly cloudy Friday night,
- Then mostly sunny and as bit warmer Saturday.
- highs 87-82 warming to 84 Saturday lows 53-52 warming to 54 Saturday. (seasonal averages high 85 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Sunny warmer (Hot) today, mostly clear tonight,
- Sunny and a bit warmer (Hot) Monday, clear at night,
- Sunny and a bit cooler (still Hot)|Tuesday, then mostly clear Tuesday night.
- highs 103-104 cooling to 100 Tuesday lows 69-62.
- Mostly sunny and cooler Wednesday, mostly clear Wednesday night,
- Partly cloudy Thursday, partly cloudy at night,
- Partly cloudy Friday, mostly clear Friday night,
- Then mostly sunny Saturday.
- highs near 85 lows 58-56 warming back to 58 Saturday (seasonal averages high 87 low 58).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Sunny and warmer today, mostly clear tonight,
- Sunny and a bit cooler Monday, partly cloudy at night,
- Partly cloudy and slightly cooler Tuesday, then partly cloudy Tuesday night.
- highs 82-76 lows 60-58.
- Partly cloudy and a bit cooler Wednesday, partly cloudy Wednesday night,
- Partly cloudy and a bit cooler Thursday and at night,
- Partly cloudy Friday, partly cloudy Friday night,
- Then partly cloudy and a bit warmer Saturday.
- highs 74-72 warming back to 74 Saturday lows 57-55.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit warmer today, mostly clear tonight,
- Sunny and a bit warmer Monday, clear at night,
- Sunny and a bit cooler Tuesday, clear Tuesday night.
- free air freezing level 16,000 ft. tonight through Tuesday night,
- highs 87-89 cooling to 84 Tuesday lows 59-52.
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Mostly sunny and a bit cooler Thursday, partly cloudy at night,
- Mostly sunny and slightly cooler Friday, partly cloudy Friday night,
- Then sunny and a bit warmer Saturday.
- free air freezing level 16,000 ft. Wednesday and Wednesday night, 13,000 ft. Thursday, 15,000 ft. Thursday night and Friday, 14,000 ft, Friday night, then 13,000 ft. Saturday.
- highs 77-70 warming to 72 Saturday lows 47-45.
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