May
01.
An Upper Level High Pressure Ridge (“Arch” shape) really heats us up Thursday. The graphics for days 1-3 show the a cold front pushing into the Willamette Valley Friday. The graphics for days 3-7 Sunday through Thursday show a complex frontal system will be approaching the Pacific Coast Monday then moving through between Wednesday and 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 54 in the Moderate 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 36 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: 2 LOW
TREES: 93 HIGH
WEEDS: 0 ABSENT
Measured 4.30.25
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,
- Mostly sunny and a bit cooler with a good (50%) chance of showers Friday afternoon, increasing clouds with a good (50%) chance of evening showers, showers likely (70%) late at night 0.10 in. of rain possible,
- Mostly cloudy with a good (50%) chance of AM showers, a mix of clouds and sun and a bit cooler with a good (50%) chance of showers Saturday afternoon, partly cloudy in the evening, then mostly clear Saturday night,
- Sunny and a bit warmer Sunday, then clear Sunday night.
- lows 44-47 cooling to 39 Saturday night highs 69-60 warming to 65 Sunday.
- Sunny and a bit warmer Monday, mostly clear Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny and a bit cooler Wednesday, partly cloudy Wednesday night,
- Then mostly sunny and a bit cooler Thursday.
- highs 73-78 cooling to 68 Thursday lows 44-47 cooling to 45 Wednesday night. (seasonal averages high 65 low 42).
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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 cooler with a slight (20%) chance of rain Friday afternoon, evening rain likely (70%), rain late Friday night,
- Mostly cloudy and much cooler with a (40%) chance of rain Saturday, just partly cloudy at night,
- Sunny and a bit warmer Sunday, then clear Sunday night,
- lows 48-42 highs 73-60 warming to 65 Sunday.
- Sunny and warmer Monday, mostly clear Monday night,
- Mostly sunny Tuesday, mostly clear at night,
- Mostly sunny and a bit cooler Wednesday, partly cloudy Wednesday night,
- Then partly cloudy and ab it cooler Thursday.
- highs 76-82 cooling to 72 Thursday lows 48-50 cooling to 48 Wednesday night. (seasonal averages high 68 low 45).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Variable evening clouds, becoming mostly cloudy with patchy fog late tonight,
- AM coastal clouds fog and mostly cloudy and a bit cooler with a slight (20%) chance of coastal rain Friday afternoon while AM inland sun and mostly cloudy with a slight (20%) chance of inland rain Friday afternoon, rain likely (70%) Friday night,
- Mostly cloudy with a (30%) chance of AM rain, partly cloudy and a bit cooler Saturday afternoon, mostly clear Saturday night.
- lows 42-44 cooling to 40 Saturday night warming to 42 Sunday night highs 62-57 warming to 60 Sunday.
- Sunny and a bit warmer Sunday, clear Sunday night,
- Mostly sunny and a bit Monday, then mostly clear Monday night.
- Sunny and a bit warmer Tuesday, partly cloudy at night,
- Partly cloudy and a bit cooler Wednesday and in the evening, mostly cloudy with a slight (20%) chance of rain Wednesday night,
- AM clouds, then sunny and a bit cooler Thursday.
- highs 59-64 cooling to 62 Wednesday lows 42-45.
- (seasonal averages high 59 low 46). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Clear tonight,
- Mostly sunny and a bit cooler with showers developing Friday afternoon, evening showers with a slight (20%) chance of thunderstorms, showers late Friday night (under 0.10 in. of rain possible, more in storms),
- Mostly cloudy with rain and snow showers and much cooler Saturday, a (40%) chance of evening rain and snow showers, then just mostly cloudy late Saturday night,
- Sunny and a bit warmer Sunday, clear Sunday night.
- free air freezing level 13,000 ft, falling to 12,000 ft. late tonight, snow level above 8,000 ft. Friday, 7,500 ft. Friday night, 5,000 ft. Saturday, 4,000ft. Saturday night, 5,000 ft. Sunday, then 7,000 ft. Sunday night.
- lows 42-27 warming to 32 Wednesday night highs 63-40 warming to 49 Sunday.
- Sunny and warmer Monday, mostly clear Monday night,
- Sunny and a bit warmer Tuesday, mostly clear at night,
- Sunny and a bit cooler Wednesday, partly cloudy with a slight (20%) chance of showers Wednesday night,
- Then mostly sunny and cooler with a slight (20%) chance of showers Thursday.
- free air freezing level 10,000 ft. Monday, 11,000 ft. Monday night, 12,000 ft. Tuesday and Tuesday night, 11,000 ft. Wednesday, snow level above 8,000 ft. Wednesday, and Wednesday night, then snow level 7,500 ft. Thursday .
- highs 47-67 cooling to 64Wedsnesday lows 34-29 warming to 35 Monday night.
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