Aug
08.
An Upper Level High Pressure Ridge (“Arch “Shape) takes over producing some hot weather. The graphics for days 1-3 show no frontal systems moving through the Pacific Northwest. The graphics for days 3-7 Monday through Friday show no frontal systems on the way to Oregon until a cold front moves through on Thursday.
ADVISORIES:
- AN EXTREME HEAT WARNING IS IN EFFECT FROM NOON SUNDAY UNTIL 5 AM 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, 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.
- AN EXTREME HEAT WATCH IS IN EFFECT FROM SUNDAY MORNING THROUGH LATE MONDAY NIGHT FOR CENTRAL DOUGLAS COUNTY.
- AN EXTREME HEAT WARNING IS IN EFFECT FROM 8 AM SUNDAY UNTIL 2 AM TUESDAY FOR EASTERN CURRY COUNTY AND JOSEPHINE COUNTY, AND JACKSON COUNTY.
- AN EXTREME HEAT WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH TUESDAY EVENING FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON, THE COLUMBIA BASIN OF OREGON, AND THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON.
- AN EXTREME HEAT WATCH IS IN EFFECT FROM SUNDAY AFTERNOON THROUGH TUESDAY EVENING 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 SUNDAY 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 SUNDAY UNTIL 2 AM TUESDAY FOR CENTRAL DOUGLAS COUNTY.
- A HEAT ADVISORY IS IN EFFECT FROM 11 AM MONDAY UNTIL 2AM TUESDAY FOR THE KLAMATH BASIN.
- A HEAT ADVISORY IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE CURRY COUNTY COAST.
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 25 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 24 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:
- Mostly sunny and a bit warmer (Hot) today, mostly clear late tonight,
- Sunny and warmer (Hot) Sunday, clear at night,
- Sunny and a bit warmer (Hot) Monday, then clear Monday night.
- highs 89-101 lows 59-63 cooling to 60 Monday night .
- Sunny and a bit cooler (still very warm) Tuesday, mostly clear Tuesday night,
- Sunny and a bit cooler Wednesday, mostly clear at night,
- Mostly sunny and a bit cooler Thursday, mostly clear Thursday night,
- Then sunny and a bit warmer Friday.
- highs 95-82 warming to 84 Friday lows 57-53. (seasonal averages high 85 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Sunny and a bit warmer today, mostly clear tonight,
- Sunny and a bit warmer (Hot) Sunday, mostly clear at night,
- Sunny and (Hot) Monday, then clear Monday night.
- highs 92-103 lows 64-69 cooling to 65 Monday night.
- Sunny and a bit cooler (still Hot)|Tuesday, mostly clear Tuesday night,
- Mostly sunny and a bit cooler Wednesday, mostly clear in the evening, partly cloudy late at night,
- Partly cloudy and a bit cooler Thursday, partly cloudy Thursday night,
- Then partly cloudy Friday.
- highs 90-85 lows 62-57. (seasonal averages high 87 low 58).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Sunny and a bit warmer today, partly cloudy tonight,
- Mostly sunny and a bit warmer Sunday, then mostly clear Sunday night,
- Sunny and a bit cooler Monday, then partly cloudy Monday night,
- highs 75-82 cooling to 76 Monday lows 56-60 cooling to 58 Monday night.
- Partly cloudy and a bit cooler Tuesday afternoon, partly cloudy Tuesday night,
- Partly cloudy Wednesday, partly cloudy at night,
- Partly cloudy and a bit cooler Thursday and Thursday night,
- Then partly cloudy and slightly cooler Friday.
- highs 74-72 lows 57-55.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly sunny and a bit warmer today, mostly clear tonight,
- Sunny and a bit warmer Sunday, mostly clear at night,
- Sunny and a bit warmer Monday, then clear Monday night.
- free air freezing level 16,000 ft. rising to above 6,000 ft. this afternoon, above 16,000 ft. tonight through Monday night.
- highs 79-88 lows 53-59 cooling to 56 Monday night.
- Sunny and a bit cooler Tuesday, mostly clear Tuesday night,
- Sunny and a bit cooler Wednesday, mostly clear in the evening, partly cloudy late at night,
- Sunny and a bit cooler Thursday, mostly clear Thursday night,
- Then sunny and slightly warmer Friday.
- free air freezing level 16,000 ft. Tuesday and Tuesday night, 15,000 ft. Wednesday, 14,000 ft. Wednesday night, 13,000 ft. Thursday, then 14,000 ft. Thursday night and Friday.
- highs 84-69 warming to 70 Friday lows 52-45.
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