Jul
03.
An Upper Level Low Pressure Trough (“U”shape) offshore is sending more cooling marine air our way. The graphics for days 1-3 show a frontal system moving through the Pacific Northwest for cooling. The graphics for days 3-7 Sunday through Thursday show no frontal systems pushing into the Pacific Northwest during the period.
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ADVISORIES:
- A RED FLAG WARNING IS IN EFFECT FOR ABUNDANT LIGHTNING ON DRY FUELS UNTIL 8 PM PDT THIS EVENING FOR THE KLAMATH BASIN, AND 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 LIGHTING FROM 2 PM UNTIL 8 PM PDT THURSDAY FOR THE BURNS BLM, AND SOUTHERN GRASSLANDS. CENTRAL CANYONLANDS, NORTHWESTERN VALE BLM, AND THE BAKER 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 34 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 13 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 30 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: 101 HIGH
TREES: 4 LOW
WEEDS: 0 LOW
Measured 7.3.25
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:
- Partly cloudy tonight,
- Mostly sunny and a bit cooler Friday (Independence Day), mostly clear Friday night,
- Sunny and a bit warmer Saturday, clear at night,
- Sunny and a bit warmer Sunday, then clear Sunday night.
- lows 50-48 warming to 53 Sunday night highs 78-86.
- Sunny and a bit warmer Monday, partly cloudy Monday night,
- Mostly sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny Wednesday, mostly clear Wednesday night,
- Then sunny Thursday.
- highs 90-92 lows 56-58. (seasonal averages high 80 low 50).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy tonight,
- AM clouds, sunny and a bit cooler Friday (Independence Day), mostly clear Friday night,
- Sunny and a bit warmer Saturday, clear at night,
- Sunny and a bit warmer Sunday, clear Sunday night.
- lows 53-56 highs 83-78 warming back to 83 Saturday. .
- Sunny and a bit warmer Monday, partly cloudy Monday night,
- Mostly sunny and a bit warmer Tuesday, mostly clear at night,
- Mostly sunny and a bit warmer Wednesday,
- Mostly sunny Thursday.
- highs 87-95 lows 58-62 (seasonal averages high 83 low 5).
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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,
- AM clouds and patchy fog, sunny and a bit warmer Friday afternoon (Independence Day), mostly clear in the evening, partly cloudy late Friday night,
- Some AM clouds, sunny and a bit warmer Saturday, mostly clear at night,
- Mostly sunny Sunday, mostly clear in the evening, then partly cloudy Sunday night.
- lows 52-49 warming to 50 Saturday night highs 66-70.
- Some AM clouds, sunny and a bit warmer Monday afternoon, partly cloudy Monday night,
- Partly cloudy Tuesday and in the evening, mostly cloudy late at night,
- AM clouds, sunny Wednesday afternoon,
- Thursday.
- highs 70-72 lows 52-54.
- (seasonal averages high 65 low 53). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy with a slight (20%) chance of thunderstorms late tonight,
- Mostly cloudy with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler with a slight (20%) chance of thunderstorms) Friday afternoon (Independence Day), partly cloudy in the evening, mostly clear late Friday night,
- Sunny and a bit warmer Saturday, clear at night,
- Sunny and a bit warmer Sunday, then clear Sunday night.
- snow level above 8,000 ft. tonight and Friday, 11,000 ft. Friday night, free air freezing level 12,000 ft. Saturday, 13,000 ft. Saturday night.
- lows 44-40 warming to 49 Sunday night highs 63-77.
- Sunny and a bit warmer Monday, partly cloudy Monday night,
- Mostly sunny and a bit warmer Tuesday, partly cloudy in the evening, mostly clear at night,
- Sunny and a bit cooler Wednesday, mostly clear Wednesday night,
- Then sunny and a bit cooler Thursday.
- highs 75-85 cooling to 83 Wednesday lows 48-54.
- free air freezing level 14,000 ft. Sunday, 15,000 ft. Sunday night, then 15,000 ft. Monday through Wednesday.
- highs 83-85 cooling 82 Thursday lows 44-54.
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