May
28.
An Upper Level High Pressure Ridge (“Arch” shape) brings more sunshine and warmer temperatures. The graphics for days 1-3 show a frontal system sliding through the Pacific Northwest by today. The graphics for days 3-7 Sunday through Thursday show a frontal system to the northwest next Thursday.
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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 26 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 17 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 31 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: 470 VERY HIGH
TREES: 11 LOW
WEEDS: 0 ABSENT
Measured 5.28.25
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:
- Mostly cloudy with a slight (20%) chance of AM rain, a mix of clouds and sun and a bit cooler this afternoon, mostly clear tonight,
- Sunny and warmer Friday, mostly clear at night,
- Mostly sunny and cooler Saturday, partly cloudy Saturday night.
- highs 73-84 Saturday cooling to 78 lows 46-52 cooling to 48 Saturday night.
- Mostly sunny and cooler Sunday, mostly clear Sunday night,
- Mostly sunny and a bit cooler with a slight (20%) chance of showers Monday, partly cloudy with a slight (20%) chance of showers at night,
- Mostly sunny with a slight (20%) chance of showers Tuesday, partly cloudy with a slight (20%) chance of showers Tuesday night,
- Then a mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Wednesday.
- highs 72-67 warming to 73 Wednesday lows 45-49. (seasonal averages high 70 low 46).
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HOME WOOD HEATING ADVISORY:
The Eugene & Springfield: GREEN– Fireplace and wood stove used is allowed. Protect air quality by not heating with wood when possible.
Oakridge And Westfir: GREEN– Fireplace and wood stove used is allowed. Protect air quality by not heating with wood when possible.
The use of pellet stoves is always allowed.
Data courtesy of Lane Regional Air Protection Agency (LRAPA.org)
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Forecast for the Umpqua Valley including Roseburg:
- Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy this afternoon, mostly clear tonight,
- Sunny and warmer Friday, mostly clear at night,
- Some AM clouds, sunny and a bit cooler Saturday afternoon, then partly cloudy Saturday night.
- highs 77-90 cooler to 82 Saturday lows 52-56 cooling to 52 Saturday night.
- Partly cloudy and a bit cooler Sunday, mostly clear in the evening, partly cloudy late Sunday night,
- Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler with a slight (20%) chance of showers Monday afternoon and at night,
- Partly cloudy with a slight (20%) chance of showers and a bit warmer Tuesday and in the evening, just partly cloudy late Tuesday night,
- Mostly cloudy start, then partly cloudy and a bit warmer Wednesday afternoon.
- highs 73-68 warming to 76 Wednesday lows 48-52. (seasonal averages high 73 low 50).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with a (30%) chance of AM showers, just mostly cloudy and a bit warmer this afternoon, becoming mostly clear tonight,
- Mostly sunny and a bit warmer Friday, partly cloudy at night,
- Partly cloudy and a bit cooler Saturday, then mostly cloudy Saturday night.
- highs 66-74 cooling to 67 Saturday lows 48-49 cooling to 47 Saturday night.
- Some AM clouds, sunny and a bit cooler Sunday, mostly clear in the evening, partly cloudy late Sunday night.
- Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit cooler with a slight (20%) chance of showers Monday afternoon, mostly cloudy with a slight (20%) chance of showers at night,
- Mostly cloudy with a slight (20%) chance of AM showers, partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday afternoon, mostly cloudy Tuesday night,
- Then mostly cloudy and a bit warmer Wednesday.
- highs 64-63 warming to 66 Wednesday lows 47-49.
- (seasonal averages high 62 low 50). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly sunny and cooler today, mostly clear tonight,
- Sunny and warmer Friday, mostly clear at night,
- Sunny and cooler Saturday, partly cloudy in the evening, then mostly cloudy with a slight (20%) chance of rain Saturday night.
- free air freezing level 12,000 ft. today, 14,000 ft. rising to 15,000 ft. late tonight through Saturday, then snow level above 8,000 ft. Saturday night.
- highs 64-82 cooling to 72 Saturday lows 44-52 cooling to 40 Saturday night.
- AM clouds and sun, sunny and cooler Sunday afternoon, mostly clear in the evening, party cloudy late Sunday night,
- A mix of clouds and sun and a bit cooler with a (40%) chance of rain and snow showers Monday, mostly cloudy with a (40%) chance of showers at night,
- A mix of clouds and sun with a (40%) chance of showers Tuesday, mostly cloudy with a (40%) chance of evening showers, partly cloudy with a (40%) chance of showers late Tuesday night,
- Then mostly sunny and a bit warmer with a slight (20%) chance of showers Wednesday.
- free air freezing level 11,000 ft. Sunday, 8,000 ft. Sunday night, snow level 5,500 ft. Monday, 6,500 ft. Monday night and Tuesday, then 7,500 ft. Tuesday night and Wednesday.
- highs 58-52 warming to 59 Wednesday lows 34-38.
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