Jun
18.
An Upper Level Low Pressure Trough (“U” shape) over the Eastern Pacific keeps the onshore airflow over us holding the temperatures down to normal levels with shower chances. The graphics for days 1-3 show the frontal system that slid through the Pacific Northwest Wednesday. The graphics for days 3-7 Saturday through Wednesday show no frontal systems pushing into the Pacific Northwest through the period.
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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 15 in the Good category measuring Particulate Matter.
Oakridge: The Air Quality Index is 14 in the Good category measuring Particulate Matter.
Cottage Grove: The Air Quality Index is 12 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: 50 HIGH
TREES: 2 LOW
WEEDS: 0 ABSENT
Measured 6.18.25
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:
- A mix of clouds and sun and a bit cooler today (Juneteenth), partly cloudy this evening, mostly cloudy with showers likely (70%) late tonight,
- Mostly cloudy with AM showers likely (70%), showers and a bit cooler with a slight (20%) chance of thunderstorms Friday afternoon and evening, showers with a slight (20%) chance of thunderstorms at night,
- Mostly cloudy with showers and a bit cooler with slight (20%) chance of thunderstorms Saturday, then cloudy with showers Saturday night.
- highs 73-60 lows 46-49.
- AM clouds with a slight (20%) chance of showers, a mix of clouds and sun and warmer with a slight (20%) chance of showers Sunday afternoon, mostly clear Sunday night,
- Mostly sunny and warmer Monday, partly cloudy at night,
- Mostly sunny and a bit warmer Tuesday, mostly clear Tuesday night,
- Then sunny and a bit cooler Wednesday.
- highs 72-84 cooling to 82 Wednesday lows 48-52. (seasonal averages high 75 low 48).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy and a bit cooler today (Juneteenth), partly cloudy this evening, mostly cloudy with a slight (20%) chance of showers late tonight,
- Mostly cloudy with a good (50%) chance of AM showers, showers and cooler with a slight (20%) chance of thunderstorms Friday afternoon and evening, a slight (20%) chance of showers late Thursday night,
- Mostly cloudy with showers Saturday, then cloudy with a good (50%) chance of showers late Saturday night.
- highs 75-63 lows 52-47 warming to 53 Saturday night. .
- Mostly cloudy with a slight (20%) chance of AM showers, just partly cloudy and warmer Sunday afternoon, mostly clear Sunday night,
- Partly cloudy and warmer Monday, partly cloudy at night,
- Then mostly sunny and a bit warmer Tuesday and Wednesday, mostly clear Tuesday night.
- highs 64-87 lows 52-56 (seasonal averages high 77 low 53).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend
- Mostly cloudy start, partly cloudy this afternoon (Juneteenth), mostly cloudy with a slight (20%) chance of showers tonight,
- Mostly cloudy with AM coastal showers while as good (50%) chance of inland AM showers, showers and a bit cooler with a slight (20%) chance of thunderstorms Friday afternoon, evening showers with a slight (20%) chance of thunderstorms, coastal showers with patchy fog late at night while patchy fog and a good (50%) chance of inland showers late at night,
- Mostly cloudy with AM showers and patchy fog, showers a Saturday afternoon, then cloudy with a good (50%) chance of showers with patchy fog late Saturday night,
- highs 66-62 lows 49-50.
- Cloudy with patchy AM fog and a slight (20%) chance of showers, just partly cloudy and a bit warmer Sunday afternoon, mostly clear Sunday night,
- Partly cloudy and a bit warmer Monday, mostly cloudy at night,
- Mostly cloudy start, sunny and a bit cooler Tuesday afternoon, mostly clear in the evening, mostly cloudy with patchy fog late Tuesday night.
- Mostly cloudy start, then sunny Wednesday afternoon.
- highs 67-70 cooling to 68 Wednesday lows 49-52.
- (seasonal averages high 64 low 51). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly cloudy and a bit cooler with a slight (20%) chance of AM rain and snow showers, rain and snow showers this afternoon (Juneteenth), mostly cloudy with a slight (20%) chance of showers late tonight,
- Mostly cloudy with a good (50%) chance of AM rain and snow showers, mostly cloudy and much cooler with rain and snow showers Friday afternoon, mostly cloudy with rain showers and snow showers and a slight (20%) chance of evening thunderstorms, rain and snow showers late at night,
- Mostly cloudy and a bit cooler with rain showers and snow showers and a slight (20%) chance of thunderstorms Saturday, then showers likely (70%) Saturday night.
- free air freezing level 13,000 ft. falling to 12,000 ft. this afternoon, snow level 6,000 ft. tonight, 5,000 ft. Friday and Friday nigh, 5,500 ft. Saturday, then 6,500 ft. Saturday night.
- highs 63-42 lows 36-33 warming back to 36 Saturday night.
- Mostly cloudy with a (40%) chance of AM showers, partly cloudy and warmer with a (40%) chance of showers Sunday afternoon, becoming mostly clear Sunday night,
- Sunny and warmer Monday, partly cloudy in the evening, mostly clear late at night,
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night
- Then sunny Wednesday.
- snow level 7,500 ft. Sunday, 8,000 ft. , free air freezing level 10,000 ft. late Sunday night, 11,000 ft. Monday, 12,000 ft. Monday night and Tuesday, then 13,000 ft. Tuesday night and Wednesday.
- highs 58-75 lows 38-47.
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