Dense fog advisory for Salem area from 1 to 10 a.m. Sunday (Oct. 31)
Quick Read
The National Weather Service in Portland issued a new Dense Fog Advisory at 6:40 p.m. Saturday, Oct. 31, for Salem, Keizer and much of the northern Willamette Valley.
The advisory runs from 1 a.m. to 10 a.m. Sunday, Nov. 1, with visibility of one quarter mile or less in dense fog.
Daylight saving time ends at 2 a.m. Sunday, and the weather service lists the advisory times in Pacific Standard Time.
Drivers should slow down and leave plenty of distance ahead; pedestrians and cyclists should wear bright or reflective clothing.
SALEM, Ore. - The National Weather Service in Portland issued a Dense Fog Advisory at 6:40 p.m. Saturday, Oct. 31, for the Salem area and much of the northern Willamette Valley. It takes effect at 1 a.m. Sunday and runs until 10 a.m. Sunday.
Forecasters expect visibility of one quarter mile or less in dense fog, and say the low visibility could make driving conditions hazardous. It's the second fog advisory of the weekend; an earlier advisory covered Saturday morning until noon.
Daylight saving time ends at 2 a.m. Sunday, when clocks fall back an hour. The weather service lists the advisory end time as 10 a.m. Pacific Standard Time, which is the new clock time.
Where it applies
The advisory covers the East Central and West Central Willamette Valley, which include Salem, Keizer and much of Marion and Polk counties. It also covers the Tualatin Valley, the Portland metro area and the Lower Columbia River in Oregon, plus the Inner Vancouver Metro and the Cowlitz County, North Clark County and East Clark County lowlands in Washington.
What to do
The weather service says drivers should slow down and leave plenty of distance ahead of them. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen in poor visibility.
For current road conditions and highway cameras, check ODOT TripCheck. The latest forecast is on the NWS forecast page for Salem.
Willamette News will update this post if the weather service extends or changes the advisory.
Sources
National Weather Service Portland: Dense Fog Advisory (issued Oct. 31, 2026, 6:40 p.m.)
ODOT TripCheck: road conditions
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