# HEADLINE
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FROST ADVISORY WILL EXPIRE AT 9 AM PDT THIS MORNING
DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL NOON PDT TODAY
# DETAILS
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WHAT
Visibility one quarter mile or less in dense fog.
WHERE
In Oregon, East Central Willamette Valley, East Portland Metro, Inner Portland Metro, Lower Columbia River, Tualatin Valley, and West Central Willamette Valley. In Washington, East Clark County Lowlands, Inner Vancouver Metro, and North Clark County Lowlands.
WHEN
Until noon PDT today.
IMPACTS
Low visibility could make driving conditions hazardous.
ISSUED AT
Saturday, October 31, 2026 at 8:47 AM PDT
ISSUED BY
National Weather Service Portland OR
HEADER
URGENT - WEATHER MESSAGE
# PRECAUTIONARY/PREPAREDNESS ACTIONS
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If driving, slow down, use your headlights, and leave plenty of distance ahead of you. Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen by others in poor visibility conditions.
# AREAS AFFECTED
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East Central Willamette Valley, East Clark County Lowlands, East Portland Metro, Inner Portland Metro, Inner Vancouver Metro, Lower Columbia River, North Clark County Lowlands, Tualatin Valley, West Central Willamette Valley
Including the cities of Dallas, Keizer, St. Helens, Wilsonville, Washougal, Portland, Brush Prairie, Molalla, Rainier, Fairview, McMinnville, Hockinson, Gresham, Lake Oswego, Newberg, Oregon City, Tigard, Battle Ground, Silverton, La Center, Vancouver, Scappoose, Camas, Eagle Creek, Forest Grove, Stayton, Sellwood, Hillsboro, Salem, Clatskanie, Rockcreek, Evergreen, Sheridan, Monmouth, Sherwood, Salmon Creek, Ridgefield, Woodburn, Happy Valley, and Troutdale