Jul
19.
An Upper Level High Pressure Ridge (“Arch”shape) weakens a bit increasing onshore airflow allowing cooling. The graphics for days 1-3 show what’s left of a weak cold frontal system that moved through the Pacific Northwest. The graphics for days 3-7 Tuesday through Saturday show a cold frontal system to the west of us and moving through Tuesday and next Wednesday.
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ADVISORIES:
- NONE AT THIS TIME.
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 22 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 11 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 19 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: 12 MODERATE
TREES: 0 ABSENT
WEEDS: 0 ABSENT
Measured 7.17.25
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:
- AM clouds, a mix of clouds and sun and a bit cooler this afternoon, mostly cloudy tonight,
- AM clouds and sun, sunny and a bit warmer Monday afternoon, mostly clear late at night,
- Sunny and a bit warmer Tuesday, then clear Tuesday night.
- highs 82-88 lows 56-52 warming to 54 Tuesday night.
- Sunny and a bit warmer Wednesday, mostly clear Wednesday night,
- Sunny and a bit cooler Thursday, mostly clear in the evening, partly cloudy at night,
- AM clouds, mostly sunny and a bit cooler Friday, mostly clear Friday night,
- Then mostly sunny Saturday.
- highs 92-85 lows 55-53. (seasonal averages high 85 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy and a bit cooler today, mostly cloudy tonight,
- AM clouds, sunny and a bit cooler Monday, mostly clear at night,
- Mostly sunny and a bit warmer Tuesday, then mostly clear Tuesday night.
- highs 85-82 warning to 89 Tuesday lows 60-58 warning to 59 Tuesday night.
- Mostly sunny and a bit warmer Wednesday, mostly clear Wednesday night,
- Some AM clouds, sunny and a bit cooler Thursday, partly cloudy at night,
- Then partly cloudy and a bit cooler Friday and Saturday, partly cloudy Friday night.
- highs 92-85 lows 60-58. (seasonal averages high 87 low 58).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy start, partly cloudy and a bit warmer this afternoon, mostly cloudy tonight,
- AM clouds, sunny and a bit cooler Monday afternoon, mostly clear in the evening, partly cloudy late at night,
- Partly cloudy and a bit warmer Tuesday, then partly cloudy Tuesday night.
- highs 69-68 warming back to 69 Tuesday lows 53-52 warming to 53 Tuesday night.
- Partly cloudy and a bit warmer Wednesday, mostly cloudy Wednesday night,
- Mostly cloudy and a bit cooler Thursday, mostly cloudy at night,
- Then mostly cloudy Friday through Saturday.
- highs 70-68 lows near 53.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy start, a mix of clouds and sun and a bit cooler this afternoon, mostly cloudy tonight,
- Mostly sunny and a bit cooler with a slight (20%) chance of showers Monday, becoming mostly clear at night,
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night.
- free air freezing level 15,000 ft. falling to 14,000 ft. this afternoon, 14,000 ft. falling to 12,000 ft. late tonight, snow level above 8,000 ft. Monday, free air freezing level 12,000 ft. Monday night, then then 13,000 ft. Tuesday and Tuesday night.
- highs 70-68 warming to 74 Tuesday lows 48-46 warming to 49 Tuesday night.
- Sunny and a bit warmer Wednesday, mostly clear Wednesday night,
- Sunny Thursday, partly cloudy at night,
- Sunny and a bit cooler Friday, partly cloudy in the evening, clear Friday night,
- Then mostly sunny Saturday.
- free air freezing level Wednesday, 14,000 ft. Wednesday night through Thursday night, then 13,000 ft. Friday through Saturday.
- highs 78-74 lows 52-48.
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