May
27.
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 between Wednesday and Thursday. The graphics for days 3-7 Friday through Tuesday show a frontal system pushing through Oregon Saturday.
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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 37 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 9 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 33 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: 334 VERY HIGH
TREES: 22 MODERATE
WEEDS: 0 ABSENT
Measured 5.27.25
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:
- Clear tonight,
- Sunny Wednesday, mostly clear in the evening, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
- AM clouds and sun with a (40%) chance of showers, a mix of clouds and sun and cooler Thursday afternoon, mostly clear at night,
- Mostly sunny and warmer Friday, then mostly clear Friday night.
- lows 52-47 warming to 50 Friday night highs 78-72 warming to 83 Friday.
- Sunny and a bit cooler Saturday, mostly clear in the evening, partly cloudy late Saturday night,
- Mostly sunny and cooler Sunday, mostly clear at night,
- Mostly sunny and cooler with a slight (20%) chance of showers Monday, partly cloudy with a slight (20%) chance of showers Monday night,
- Then mostly sunny and as bit cooler with a slight (20%) chance of showers Tuesday.
- highs 82-68 warming to 70 Tuesday lows 48-45 warming to 47 Monday night. (seasonal averages high 70 low 45).
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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:
- Clear tonight,
- Sunny and a bit cooler Wednesday, mostly clear in the evening, partly cloudy with a slight (20%) chance of showers Wednesday night,
- Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy and a bit cooler Thursday afternoon, mostly clear at night,
- Mostly sunny and warmer Friday, then mostly clear Friday night.
- lows 56-52 warming to 55 Friday night highs 82-76 warming to 89 Friday.
- Sunny and a bit warmer Saturday, partly cloudy Saturday night,
- Partly cloudy and a bit cooler Sunday, mostly clear in the evening, partly cloudy late at night,
- Mostly cloudy start, partly cloudy and a bit cooler with a slight (20%) chance of showers Monday afternoon and Monday night,
- Then partly cloudy with a slight (20%) chance of showers Tuesday.
- highs 85-68 warming to 72 Tuesday lows 52-49 warming back to 52 Monday night. (seasonal averages high 73 low 50).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly clear this evening, partly cloudy late tonight,
- AM clouds, sunny Wednesday afternoon, mostly cloudy with a slight (20%) chance of showers late Wednesday night,
- Mostly cloudy with a (30%) chance of AM showers, just mostly cloudy and a bit cooler Thursday afternoon, mostly clear at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- lows 49-50 cooling to 48 Thursday night warming to 49 Friday night highs 67-66 warming to 73 Friday.
- Sunny a bit cooler Saturday, partly cloudy Saturday night,
- Partly cloudy and a bit cooler Sunday, mostly clear in the evening, partly cloudy at night,
- Mostly cloudy with a slight (20%) chance of showers and a bit cooler Monday, partly cloudy with a slight (20%) chance of evening showers, mostly cloudy with a slight (20%) chance of showers late Monday night,
- Then partly cloudy and a bit warmer with a slight (20%) chance of showers Tuesday.
- highs 67-63 warming to 65 Tuesday lows 48-47.
- (seasonal averages high 62 low 49). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear tonight,
- Sunny and a bit warmer Wednesday, partly cloudy with a slight (20%) chance of evening thunderstorms, just partly cloudy late Wednesday night,
- AM sun with a slight (20%) chance of showers, mostly sunny and cooler Thursday, partly cloudy in the evening, clear late at night,
- Sunny and warmer Friday, mostly clear Friday night.
- free air freezing level 14,000 ft. tonight, 13,000 ft. Wednesday, 14,000 ft. falling to 13,000 ft. Wednesday night,snow level above 8,000 ft. Thursday free air freezing level 14,000 ft. Thursday night, then 15,000 ft. Friday and Friday night,.
- lows 50-43 Friday night warming back to 50 highs 77-65 warming to 82 Friday.
- Sunny and a bit cooler Saturday, mostly clear with a slight (20%) chance of evening showers, partly cloudy with a slight (20%) chance of showers Saturday night,
- Mostly sunny and cooler Sunday, mostly clear with a slight (20%) chance of evening showers, party cloudy with a slight (20%) chance of showers late at 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 Monday night,
- Then a mix of clouds and sun and a bit cooler with a (40%) chance of showers Tuesday.
- free air freezing level 15,000 ft. Saturday, snow level above 8,000 ft. Saturday night, free air freezing level 9,000 ft. Sunday, snow level 6,000 ft. Sunday night, 5,500 ft. Monday, then 6,500 ft. Monday night and Tuesday.
- highs 74-52 lows 42-34 warming to 36 Tuesday night.
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