An Upper Level High Pressure Ridge (“Arch”shape) kept heating us up today, but that’s going to change. The graphics for days 1-3 show a dry cold front moving through the Pacific Northwest tomorrow. The graphics for days 3-7 Friday through Tuesday show a cold frontal system will be to our northwest then pushing through next Monday.
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- A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING UNTIL 11 PM TONIGHT FOR THE CENTRAL MOUNTAINS OF OREGON AND THE SOUTHERN DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS UNTIL 11 PM TONIGHT FOR THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, AND THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
- A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS FROM 2 PM UNTIL 9 PM WEDNESDAY FOR THE KLAMATH BASIN, THE FREMONT-WINEMA NATIONAL FOREST, AND THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
- A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING UNTIL 11 PM TONIGHT FOR THE JOHN DAY VALLEY, THE CENTRAL MOUNTAINS OF OREGON, AND THE SOUTHERN DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FOR WIND AND LOW RELATIVE HUMIDITY FROM 11 AM UNTIL 10 PM WEDNESDAY FOR THE LOWER COLUMBIA BASIN OF OREGON.
- A RED FLAG WARNING IS IN EFFECT FROM 2 PM UNTIL 11 PM WEDNESDAY FOR ABUNDANT LIGHTNING FOR THE SOUTHERN BLUE MOUNTAINS OF OREGON.
- A RED FLAG WARNING IS IN EFFECT FOR LIGHTNING FROM 3 PM MDT WEDNESDAY THROUGH 11 PM WEDNESDAY EVENING FOR THE BURNS BLM, THE SOUTHERN GRASSLANDS, CENTRAL CANYONLANDS, AND THE NORTHWESTERN VALE BLM.
- A HEAT ADVISORY IS IN EFFECT FROM 11 AM UNTIL 9 PM TODAY FOR THE LOWER COLUMBIA BASIN OF OREGON AND THE FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON.
- A HEAT ADVISORY IS IN EFFECT UNTIL 9 PM MDT TONIGHT FOR THE OREGON LOWER TREASURE VALLEY.
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 43 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 19 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 40 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: 24 HIGH
TREES: 0 ABSENT
WEEDS: 0 ABSENT
Measured 7.7.25
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 clear tonight,
- Sunny and cooler Wednesday, partly cloudy in the evening, mostly cloudy Wednesday night,
- AM clouds and sun, sunny and a bit warmer Thursday afternoon, clear at night,
- Sunny and warmer Friday, clear Friday night.
- lows 55-58 cooling back to 55 Thursday night warming to 57 Friday night highs 83-84 warming to 92 Friday.
- Sunny and a bit warmer Saturday, clear Saturday night,
- Sunny Sunday, clear at night,
- Sunny and a bit cooler Monday, clear Monday night,
- Then sunny and a bit warmer Tuesday.
- highs 94-92 warming to 95 Tuesday lows 58-56. (seasonal averages high 82 low 51).
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Forecast for the Umpqua Valley including Roseburg:
- Mostly clear this evening, partly cloudy late tonight,
- Some AM clouds, sunny and a bit cooler Wednesday afternoon, mostly clear in the evening, mostly cloudy late Wednesday night,
- AM clouds, sunny and a bit warmer Thursday afternoon, clear Thursday night,
- Sunny and a bit warmer Friday, then clear Friday night.
- lows 58-62 cooling to 60 Thursday night warming to 62 Friday night highs 86-92. .
- Sunny and a bit warmer Saturday, clear Saturday night,
- Sunny and a bit warmer Sunday, clear at night,
- Sunny and a bit cooler Monday, clear Monday night,
- Then sunny and a bit warmer Tuesday.
- highs 95-96 cooling to 94 Monday warming to 95 Tuesday lows 63-64 cooling to 60 Monday night (seasonal averages high 84 low 57).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Partly cloudy this evening, mostly cloudy with patchy fog late tonight,
- Mostly cloudy with patchy AM fog, sunny and a bit warmer Wednesday afternoon, mostly cloudy Wednesday night,
- AM clouds, sunny Thursday afternoon, mostly clear at night,
- Mostly sunny Friday, then mostly clear Friday night.
- lows 54-55 cooling to 53 Thursday night and Friday night highs near 72.
- Mostly sunny Saturday, a mostly clear in the evening, partly cloudy late Saturday night,
- Mostly sunny and a bit warmer Sunday, mostly clear at night,
- Mostly sunny and a bit cooler Monday, mostly clear Monday night,
- Some AM clouds, then sunny and a bit warmer Tuesday afternoon.
- highs 73-70 warming back to 73 Tuesday lows 54-52.
- (seasonal averages high 66 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear tonight,
- Sunny and a bit cooler Wednesday, partly cloudy in the evening, mostly cloudy late Wednesday night,
- Mostly sunny Thursday, clear at night,
- Sunny and a bit warmer Friday, clear Friday night.
- free air freezing level 15,000 ft. falling to 14,000 ft. tonight, 13,000 ft Wednesday, 14,000 ft. rising to 15,000 ft. Wednesday night, 15,000 ft. Thursday and Thursday night, then 16,000 ft. Friday and Friday night.
- lows 48-52 highs 72-82.
- Sunny and a bit warmer Saturday, clear Saturday night,
- Sunny Sunday, clear at night,
- Sunny Monday, clear Monday night,
- Then sunny and a bit warmer Tuesday.
- highs 83-84 Wednesday lows 53-52.
- free air freezing level 16,000 ft. Saturday through Sunday, then 16,000 ft. Sunday night through Monday.
- highs 82-83 lows 52-53.
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