Crooked River National Grassland
Air Stagnation Advisory issued December 29 at 12:03PM PST until January 1 at 12:00PM PST by NWS Pendleton OR
December 29th, 12:03 PM
— 9:00 AM
* WHAT...Stagnant conditions will have the potential to trap pollutants near the ground and deteriorate air quality. * WHERE...Foothills of the Blue Mountains of Oregon and Washington, Lower Columbia Basin of Oregon and Washington, North Central Oregon, Central Oregon, Kittitas Valley, and Yakima Valley. * WHEN...Until noon PST Thursday. * IMPACTS...Periods of air stagnation can lead to the buildup of pollutants near the surface, potentially leading to poor air quality.
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