Jul
26.
A slow moving Upper Level Low Pressure Trough (“U” shape) starts a slow cooling trend. The graphics for days 1-3 show a weak cold front that’s sliding out of the Pacific Northwest today for cooling. The graphics for days 3-7 Tuesday through Saturday show a frontal system offshore Thursday then moving in next Friday.
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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 24 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 26 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: 8 MODERATE
TREES: 0 ABSENT
WEEDS: 0 ABSENT
Measured 7.25.25
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 clear tonight,
- Sunny and a bit warmer Sunday, mostly clear Sunday night,
- Sunny and a bit warmer Monday, clear at night,
- Sunny and a bit warmer Tuesday, then mostly clear in the evening, partly cloudy late Tuesday night.
- lows 52-56 highs 85-92.
- Sunny and a bit cooler Wednesday, partly cloudy in the evening, mostly cloudy Wednesday night,
- A mix of clouds and sun and a bit cooler with a slight (20%) chance of showers Thursday, mostly cloudy in the evening, partly cloudy late at night,
- Mostly sunny and a bit cooler Friday, partly cloudy in the evening, clear late Friday night,
- Then sunny and a bit warmer Saturday.
- highs 90-85 warming to 87 Saturday lows 57-55. (seasonal averages high 86 low 53).
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Forecast for the Umpqua Valley including Roseburg:
- Clear with patchy fog late tonight,
- Patchy AM fog, sunny and a bit warmer Sunday, mostly clear with patchy fog late Sunday night,
- Sunny and a bit cooler Monday, clear at night,
- Sunny and a bit warmer Tuesday, mostly clear Tuesday night.
- lows 56-60 highs 92-86 warming to 88 Tuesday.
- Sunny with a slight (20%) chance of thunderstorms Wednesday afternoon, mostly cloudy with a slight (20%) chance of thunderstorms, a slight (20%) chance showers late Wednesday night,
- Mostly cloudy with a slight (20%) chance of thunderstorms and a bit cooler Thursday, partly cloudy a slight (20%) chance of evening showers with patchy fog late at night,
- Some AM clouds with patchy fog, sunny Friday afternoon, mostly clear with patchy fog late Friday night,
- Some AM clouds, then sunny and a bit warmer Saturday afternoon.
- highs 86-87 lows 62-59. (seasonal averages high 88 low 58).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly clear with patchy evening coastal fog and areas of coastal fog while inland patchy fog late tonight,
- Some AM clouds with patchy fog, sunny and a bit warmer Sunday afternoon, mostly clear with patchy evening coastal fog, partly cloudy with areas of fog late Sunday night,
- Patchy AM fog, sunny and a bit warmer Monday afternoon, mostly clear with areas of fog late at night,
- Areas of AM fog, mostly sunny Tuesday afternoon, mostly clear in the evening, mostly cloudy with patchy fog late Tuesday night.
- lows 52-54 highs near 70-72.
- Mostly cloudy with areas of AM fog, partly cloudy and a bit cooler Wednesday afternoon, patchy evening fog, mostly cloudy with patchy fog late Wednesday night,
- Patchy AM/late night fog, mostly cloudy Thursday and at night,
- AM AM/late night fog, partly cloudy and a bit warmer Friday and Friday night,
- Patchy AM fog, then partly cloudy and a bit cooler with patchy fog Saturday afternoon.
- highs 70-72 cooling back to 70 Saturday lows 56-55.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Mostly clear tonight,
- Sunny and a bit warmer Sunday, mostly clear Sunday night,
- Sunny and a bit warmer with a slight (20%) chance of thunderstorms Monday afternoon, mostly cloudy with a slight (20%) chance of evening showers, then mostly clear late at night,
- Sunny and a bit warmer Tuesday, mostly cloudy with a slight (20%) chance of evening thunderstorms, then partly cloudy with a slight (20%) chance of thunderstorms late Tuesday night.
- free air freezing level 13,000 ft. tonight through Monday, snow level above 8,000 ft. Monday night, then free air freezing level 14,000 ft. Tuesday and Tuesday night.
- lows 45-53 highs 74-82.
- Mostly sunny and a bit cooler with a (40%) chance of showers and a slight (20%) chance of thunderstorms Wednesday, mostly cloudy with a slight (20%) of thunderstorms Wednesday night,
- A mix of clouds and sun and a bit cooler with a (30%) chance of showers a slight (20%) chance of thunderstorms Thursday, mostly cloudy with a slight (20%) chance of thunderstorms at night,
- Mostly sunny and a bit cooler with a slight (20%) chance of thunderstorms Friday, just partly cloudy Friday night,
- Then sunny and a bit warmer Saturday.
- free air freezing level 14,000 ft.Wednesday and Wednesday night, snow level above 8,000 ft. Thursday, then free air freezing level 13,000 ft. Thursday night through Saturday.
- highs 80-70 warming to 73 Saturday lows 52-48.
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