An Upper Level High Pressure Ridge brings sunshine and slowly warming temperatures. The graphics for days 1-3 show a cold frontal system sliding in between today and tonight. The graphics for days 3-7 Friday through Tuesday show no frontal activity moving toward the coast or through the Pacific Northwest through the period until a cold front moves in next Monday and Tuesday.
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.
_______________
Measured 8.18.25
Forecast for the Southern and lower Mid Willamette Valley including Eugene-Springfield and Albany-Corvallis:
- Sunny and a bit warmer today, partly cloudy this evening, mostly clear late tonight,
- Sunny and a bit warmer Wednesday, clear at night,
- Sunny and a bit warmer Thursday, then clear Thursday night.
- highs 84-92 lows 54-56.
- Sunny and a bit warmer Friday and Saturday, mostly clear Friday night,
- Sunny Saturday, mostly clear at night,
- Then sunny and a bit cooler Sunday and Monday, mostly clear Sunday night.
- highs 93-88 lows 57-56. (seasonal averages high 84 low 51).
________________
Forecast for the Umpqua Valley including Roseburg:
- Sunny and a bit warmer today, clear tonight,
- Sunny and a bit warmer Wednesday, clear at night,
- Sunny and a bit warmer Thursday, then clear Thursday night.
- highs 86-92 lows 57-60.
- Sunny and a bit warmer Friday, clear Friday night,
- Mostly sunny and a bit cooler Saturday, mostly clear at night,
- Sunny and a bit cooler Sunday and Monday, clear Sunday night,
- highs near 96-92 lows 62-60 warming back to 62 Sunday night. (seasonal averages high 86 low 57).
_______________
Forecast for The South Oregon Coast Including Coos Bay and North Bend:
- Mostly sunny and a bit warmer today, mostly clear tonight,
- Some AM clouds, sunny Wednesday, clear at night,
- Sunny Thursday, then clear Thursday night.
- highs near 76 lows 53-56 cooling to 54 Wednesday night warning to 55 Thursday night .
- Mostly sunny and a bit cooler Friday, mostly clear Friday night,
- Mostly sunny and a bit warmer Saturday, mostly clear in the evening, partly cloudy late at night,
- Mostly sunny Sunday, mostly clear Sunday night,
- Then mostly sunny and a bit cooler Monday.
- highs 73-75 cooling to 74 Friday and Saturday lows near 54.
- (seasonal averages high 67 low 54). _______________
Forecast for the Northern Oregon Cascades including the Cascades in Lane County:
- Sunny and a bit warmer today, partly cloudy this evening, clear tonight,
- Sunny Wednesday, clear at night,
- Sunny and warmer Thursday, then clear Thursday night.
- free air freezing level 14,000 ft. tonight and Tuesday, 13,000 ft. Tuesday night through Wednesday night, then 16,000 ft. Thursday and Thursday night.
- highs 73-82 lows 46-53.
- Sunny and a bit warmer Friday, mostly clear Friday night,
- Then sunny and a bit cooler Saturday, Sunday, and Monday,mostly clear each night.
- free air freezing level 16,000 ft. Thursday through Saturday night, then 15,000 ft. Sunday through Monday.
- 88-82 lows 56-53.