An Upper Level High Pressure Ridge (“Arch” shape) Known as a “Omega Block” is keeping our weather pattern stuck. The graphics for days 1-3 show the weak cold front that slipped under the ridge pushing into the Willamette Valley Wednesday. The graphics for days 3-7 Sunday through Thursday show a complex frontal system moving into Oregon Monday, then another complex frontal system will be offshore 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 42 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 43 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: 9 MODERATE
TREES: 65 MODERATE
WEEDS: 2 LOW
Measured 5.8.25
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 this evening, partly cloudy late tonight,
- A mix of clouds and sun and a bit warmer Friday, mostly cloudy Friday night,
- A mix of clouds and sun and a bit cooler Saturday, mostly cloudy Saturday night,
- Mostly cloudy and a bit cooler with showers likely (70%) Sunday, then mostly cloudy with showers Sunday night.
- lows 42-47 cooling to 45 Sunday night highs 74-64.
- Mostly cloudy and a bit cooler with showers likely (70%) Monday, mostly cloudy with a good (50%) chance of evening showers and a slight (20%) chance of thunderstorms, partly cloudy with a good (50%) chance of showers and a slight (20%) chance of thunderstorms late Monday night,
- Mostly cloudy with a (40%) chance of AM showers, a mix of clouds and sun with a (40%) chance of showers Tuesday afternoon, mostly cloudy with a slight (20%) chance of showers at night,
- A mix of clouds and sun and a bit warmer with a slight (20%) chance of showers Wednesday, partly cloudy Wednesday night,
- Then a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday.
- highs 62-66 cooling to 64 Wednesday night lows 43-45. (seasonal averages high 67 low 43).
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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 clear tonight,
- Partly cloudy and a bit warmer Friday, partly cloudy Friday night,
- Partly cloudy and a bit cooler Saturday, then mostly cloudy at night,
- Mostly cloudy with a slight (20%) chance of AM rain, showers and cooler Sunday afternoon, then mostly cloudy with showers Sunday night.
- lows 47-49 cooling to 47 Sunday night highs 80-67.
- Mostly cloudy with showers and a bit cooler Monday, mostly cloudy with a (30%) chance of showers Monday night,
- Mostly cloudy with a slight (20%) chance of AM showers, just mostly cloudy Tuesday afternoon and at night,
- Partly cloudy and a bit warmer Wednesday, partly cloudy Wednesday night,
- Mostly cloudy start, then partly cloudy and a bit cooler with a slight (20%) chance of showers Thursday afternoon.
- highs 64-69 cooling to 67 lows 48-46. (seasonal averages high 70 low 47).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Becoming party cloudy late tonight,
- Partly cloudy and a bit warmer Friday, mostly cloudy Friday night,
- Mostly cloudy and a bit cooler Saturday, mostly cloudy at night,
- Mostly cloudy with a slight (20%) chance of AM rain, a (40%) chance of rain and a bit cooler Sunday afternoon, evening showers likely (70%), then Sunday night.
- lows 46-44 warming to 45 Sunday night cooling to 44 Monday highs 65-60.
- Mostly cloudy with AM showers, showers likely (70%) Monday afternoon, partly cloudy with a slight (40%) chance of evening showers , mostly cloudy with a slight (20%) chance of showers Monday night,
- Mostly cloudy and a bit warmer Tuesday and at night,
- Mostly cloudy Wednesday, mostly cloudy Wednesday night,
- Then mostly cloudy with a slight (20%) chance of showers Thursday.
- highs near 62 lows 44-45 cooling back to 44 Wednesday night.
- (seasonal averages high 60 low 47). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit cooler today, mostly clear tonight,
- Mostly sunny and a bit warmer Friday, mostly cloudy at night,
- A mix of clouds and sun and a bit cooler Saturday, mostly cloudy with a slight (20%) chance of showers Saturday night.
- free air freezing level 10,000 ft. rising to 11,000 ft. this afternoon, 11,000 ft. rising to 12,000 ft. tonight, 12,000 ft. Friday and Friday night, 11,000 ft. Saturday, then snow level 7,000 ft. Saturday night.
- highs 65-70 cooling to 63 Saturday lows 40-42 cooling to 38 Friday night.
- AM clouds and sun with a (30%) chance of AM with a good (50%) chance of rain and snow showers, mostly cloudy and cooler with a good (50%) chance of rain and snow showers Sunday afternoon, mostly cloudy with rain and snow showers Sunday night,
- Mostly cloudy and a bit cooler with rain and snow showers Monday, a good (50%) chance of rain and snow showers at night,
- A mix of clouds and sun and a bit cooler with a good (50%) chance of rain and snow showers Tuesday, a (40%) chance of rain showers and aslifght (20%) chance of snow showers Tuesday night,
- Partly cloudy with a (30%) chance of rain showers and a slight (20%) chance of snow showers and a bit warmer Wednesday afternoon.
- snow level 6,000 ft. Sunday, 5,000 ft. Sunday night, 4,500 ft. Monday through Tuesday, then 5,500 ft. Tuesday night and Wednesday.
- highs 50-42 warming to 46 Wednesday lows 34-32.
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