Aug
05.
An Upper Level Low Pressure Trough (“U “Shape) keeps up the onshore airflow to control temperatures through Thursday. Then high pressure takes over producing some hot weather. The graphics for days 1-3 show a cold frontal system moving through the Pacific Northwest Wednesday. The graphics for days 3-7 Friday through Tuesday show no frontal systems on the way to Oregon 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 23 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 17 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: 5 MODERATE
TREES: 0 ABSENT
WEEDS: 0 LOW
Measured 8.4.25
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:
- Clouds and sun with a slight (20%) chance of AM showers, a mix of clouds and sun and a bit cooler with a slight (20%) chance of showers this afternoon, mostly cloudy with a slight (20%) chance of showers late tonight,
- Mostly sunny and a bit warmer Thursday, mostly clear late at night,
- Sunny and a bit warmer Friday, then mostly clear Friday night.
- highs 80-85 lows 57-50 warming to 55 Friday night.
- Mostly sunny and a bit warmer Saturday, partly cloudy in the evening, mostly clear Saturday night,
- Sunny and a bit warmer (Hot) Sunday and Monday, clear both nights,
- Then sunny and a bit cooler (still very warm) Tuesday.
- highs 89-99 cooling to 94 Tuesday lows 58-62 cooling to 59 Tuesday. (seasonal averages high 86 low 52).
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Forecast for the Umpqua Valley including Roseburg:
- Partly cloudy with a slight (20%) chance of AM showers, just partly cloudy this afternoon, mostly cloudy with a slight (20%) chance of showers tonight and patchy fog late tonight,
- Mostly cloudy with patchy AM fog, sunny Thursday afternoon, mostly clear at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- highs 85-89 lows 63-56 warming to 62 Friday night .
- Mostly sunny and a bit warmer Saturday, mostly clear Saturday night,
- Mostly sunny and a bit warmer (Hot) Sunday, clear at night,
- Sunny and a bit warmer (Hot) Monday, clear Monday night,
- Then sunny and a bit cooler (still Hot)|Tuesday.
- highs 90-100 lows 60-65. (seasonal averages high 87 low 58).
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Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly cloudy with patchy AM fog and a slight (20%) chance of coastal showers while mostly cloudy with patchy fog and a slight (20%) chance of inland AM showers, partly cloudy and a bit warmer this afternoon, patchy evening coastal fog and a slight (20%) chance of coastal showers with areas of coastal fog late tonight while mostly cloudy with a slight (20%) chance of inland showers and patchy fog late tonight,
- Mostly cloudy with patchy AM fog, sunny and a bit cooler Thursday afternoon, partly cloudy at night,
- Mostly sunny and a bit warmer Friday, then mostly clear Friday night.
- highs near 74 lows 59-54 warming to 57 Friday night.
- Partly cloudy Saturday and Saturday night,
- Mostly sunny and a bit warmer Sunday, mostly clear at night,
- Mostly sunny and a bit warmer Monday, partly cloudy Monday night,
- Then partly cloudy and a bit cooler Tuesday.
- highs near 76 lows near 57.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- A mix of clouds and sun and a bit cooler today, mostly cloudy with a (40%) chance of evening showers, a slight (20%) chance of showers late tonight,
- Mostly cloudy with a slight (20%) chance of AM showers, sunny and a bit cooler Thursday, partly cloudy in the evening, mostly clear late at night,
- Sunny and a bit warmer Friday, mostly clear Friday night.
- free air freezing level 12,000 ft. today, snow level above 8,000 ft. tonight, 8,000 ft. Thursday, free air freezing level 13,000 ft. rising to 14,000 ft. Friday afternoon, then 16,000 ft. Friday night.
- lows 48-42 warming to 47 Friday night highs 70-68 warming back to 70 Thursday.
- Sunny and a bit warmer Saturday, partly cloudy in the evening, mostly clear late Saturday night,
- Sunny and a bit warmer Sunday and Monday, mostly clear both nights,
- Then sunny and a bit cooler Tuesday.
- free air freezing level 16,000 ft. Saturday, above 16,000 ft. Saturday night through Sunday night, then 16,000 ft. Monday through Tuesday.
- highs 77-85 lows 50-55.
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