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Air Stagnation Persists Across Oregon as NWS Adds Dense, Freezing Fog Advisories

Agencies urge sensitive groups to limit outdoor exposure due to trapped pollutants.

Overview

  • The National Weather Service maintains air stagnation advisories for the Columbia River Gorge, Willamette Valley, and parts of central and eastern Oregon through early Friday.
  • The Oregon DEQ’s air quality advisory covers Lake County, southern Klamath County, and southern Deschutes County through 10 a.m. Friday due to smoke and pollutants lingering near the surface.
  • A dense fog advisory for Central Douglas County was in effect until 10 a.m. Wednesday, with visibility down to one quarter mile and hazardous driving conditions.
  • A freezing fog advisory for portions of the Willamette Valley was in effect until noon Wednesday, with quarter-mile visibility, temperatures near 28–32°F, and risks of rime ice and black ice.
  • Officials urge residents to follow burn restrictions, limit wood-stove use, reduce outdoor exertion—especially for people with heart or lung conditions—and monitor local AQI and NWS updates, with short-term alerts noted for Klamath, Lake, and Deschutes counties.