Jul
29.
A strengthening Upper Level High Pressure Ridge (“Arch “Shape) has brought some warming. The graphics for days 1-3 show no frontal systems moving into the Pacific Northwest. The graphics for days 3-7 Saturday through Wednesday show a frontal system moving into the Pacific Northwest Saturday and Sunday. A cold front will be pushing through Tuesday and next Wednesday.
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ADVISORIES:
- A TSUNAMI ADVISORY IS IN EFFECT UNTIL FURTHER NOTICE FOR THE COASTAL AREAS OF OREGON, WASHINGTON, AND BRITISH COLUMBIA FROM THE OREGON/CALIFORNIA BORDER TO THE BRITISH COLUMBIA/ALASKA BORDER\.
- A RED FLAG WARNING IS IN EFFECT FROM 11AM UNTIL 11 PM TODAY FOR THUNDERSTORMS FOR THE NORTHERN WILLAMETTE NATIONAL FOREST AND THE SOUTHERN WILLAMETTE NATIONAL FORECAST.
- A RED FLAG WARNING IS IN EFFECT FROM 2 PM UNTIL 11 PM TODAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE UMPQUA NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM TODAY UNTIL 11 AM THURSDAY FOR THE CENTRAL MOUNTAINS OF REGON AND THE DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 9 PM TODAY FOR THE CENTRAL MOUNTAINS OF OREGON AND THE DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM TODAY UNTIL 11 AM THURSDAY FOR ABUNDANT LIGHTNING FOR THE NORTHERN DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 9 PM TODAY FOR ABUNDANT LIGHTNING FOR THE NORTHERN DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FROM 2 PM UNTIL 11 PM TODAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE SOUTHERN OREGON CASCADES, THE KLAMATH BASIN AND THE FREMONT-WINEMA NATIONAL FOREST, THE SOUTH CENTRAL OREGON DESERT INCLUDING THE BLM LAND IN EASTERN LAKE AND WESTERN HARNEY COUNTIES.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM TODAY UNTIL 11 AM THURSDAY FOR THE WESTERN FORESTED BLUE MOUNTAINS. MOUNTAINS OF OREGON AND THE DESCHUTES NATIONAL FOREST.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM TODAY UNTIL 11 AM THURSDAY FOR THE WESTERN FORESTED BLUE MOUNTAINS.
- A RED FLAG WARNING IS IN EFFECT FROM 1 PM UNTIL 9 PM TODAY FOR THE WESTERN FORESTED BLUE MOUNTAINS.
- A RED FLAG WARNING IS IN EFFECT FROM 2 PM UNTIL 11 PM TODAY FOR THE BURNS BLM AND THE THE SOUTHERN GRASSLANDS.
- A RED FLAG WARNING IS IN EFFECT UNTIL 11 PM TONIGHT FOR THE NORTHWESTERN VALE BLM.
- A FIRE WEATHER WATCH IS IN EFFECT FROM 11 AM TODAY THROUGH 11 AM THURSDAY FOR THUNDERSTORMS (15%-35% CHANCE) FOR THE NORTHERN WILLAMETTE NATIONAL FOREST AND THE SOUTHERN WILLAMETTE NATIONAL FOREST.
- A FIRE WEATHER WATCH IS IN EFFECT FROM THIS AFTERNOON THROUGH THURSDAY MORNING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR THE UMPQUA NATIONAL FOREST.
- A FIRE WEATHER WATCH IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS FROM THIS EVENING THROUGH THURSDAY MORNING FOR THE UMPQUA BASIN.
- A HEAT ADVISORY IS IN EFFECT FROM NOON UNTIL 11 PM TODAY FOR THE EASTERN COLUMBIA RIVER GORGE OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
- A HEAT ADVISORY IS IN EFFECT FROM NOON TODAY UNTIL 11 PM THURSDAY FOR THE THE LOWER COLUMBIA BASIN OF OREGON, THE FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON, AND NORTH CENTRAL OREGON.
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 29 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 21 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 28 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: 6 MODERATE
TREES: 0 ABSENT
WEEDS: 0 ABSENT
Measured 7.28.25
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 today, mostly cloudy tonight,
- AM clouds, a mix of clouds and sun and a bit cooler Thursday, mostly cloudy in the evening, clear late at night,
- Sunny and a bit warmer Friday, then mostly clear Friday night.
- highs 92-85 warming to 87 Friday lows 58-55.
- Sunny and a bit cooler Saturday, mostly clear Saturday night,
- Mostly sunny and a bit cooler Sunday, partly cloudy in the evening, mostly clear late Sunday night,
- Then mostly sunny and a bit warmer Monday and Tuesday,partly cloudy Monday night.
- highs 86-82 warming back to 86 Tuesday lows 52-55. (seasonal averages high 86 low 53).
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Forecast for the Umpqua Valley including Roseburg:
- Sunny with a slight (20%) chance of thunderstorms this afternoon, partly cloudy with a slight (20%) chance of evening thunderstorms, mostly cloudy with a slight (20%) chance of thunderstorms late at tonight,
- Mostly cloudy with patchy AM fog, partly cloudy with a slight (20%) chance of thunderstorms and a bit cooler Thursday afternoon and in the evening, mostly clear late at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- highs 92-85 warming to 89 Friday lows 62-59.
- Some AM clouds, sunny and a bit cooler Saturday afternoon, partly cloudy Saturday night,
- Partly cloudy and a bit cooler Sunday, partly cloudy in the evening, mostly clear at night,
- Then partly cloudy and a bit warmer Monday and Tuesday, partly cloudy Monday night,
- highs 87-84 warming to 88 Tuesday lows 57-55 warming to 88 Tuesday. (seasonal averages high 88 low 59).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with patchy AM fog, sunny and a bit warmer with a slight (20%) of inland thunderstorms this afternoon, mostly cloudy with patchy coastal fog late tonight with a slight (20%) chance of coastal thunderstorms late tonight while mostly cloudy with a slight (20%) chance of inland thunderstorms with patchy fog late tonight,
- Mostly cloudy with a slight (20%) chance of AM coastal thunderstorms while cloudy with a slight (20%) chance of inland thunderstorms, partly cloudy with patchy dense fog Thursday afternoon, mostly cloudy with patchy fog late Thursday night,
- AM/late night fog, partly cloudy Friday afternoon, partly cloudy Friday night,
- highs near 72 lows 57-55.
- Patchy AM/late night fog, partly cloudy and a bit cooler Saturday and Saturday night,
- Patchy AM/late night fog, mostly cloudy start, sunny Sunday afternoon, partly cloudy at night,
- Partly cloudy and a bit warmer Monday and in the evening, mostly cloudy with patchy fog late Monday night,
- AM clouds with patchy fog, then sunny and a bit warmer Tuesday afternoon.
- highs 70-73 lows 54-56.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly sunny and a bit warmer with a good (50%) chance of thunderstorms this afternoon (0.25 in.of rain possible), mostly cloudy with a good (50% ) chance of evening thunderstorms, partly cloudy with a slight (20%) chance of showers late tonight,
- A mix of clouds and sun and cooler with a good (50%) chance of showers and a slight (20%) chance of thunderstorms Thursday, mostly cloudy with a slight (20%) chance of evening showers and thunderstorms, partly cloudy with a slight (20%) chance of showers late at night,
- Mostly sunny and a bit warmer with a slight (20%) chance of showers Friday, partly cloudy in the evening, then mostly clear late Friday night.
- free air freezing level 14,000 ft. today and tonight, snow level above 8,000 ft. Thursday and Thursday night, then free air freezing level 13,000 ft. Friday and Friday night.
- highs 82-77 lows 52-48.
- Sunny Saturday, mostly clear in the evening, partly cloudy late Saturday night,
- Mostly sunny and a bit cooler Sunday, partly cloudy at night,
- Mostly sunny Monday, partly cloudy Monday night,
- Then sunny Tuesday.
- snow level above 8,000 ft. Friday, free air freezing level 13,000 ft. Friday night through Saturday night, 12,000 ft. Sunday, 13,00 ft. Sunday night and Monday, then 14,000 ft. Monday night and Tuesday.
- highs 73-70 Sunday lows 47-45.
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