Active AlertsWenatchee, WA

What: Stagnant conditions will have potential to trap pollutants near the ground with deteriorated air quality.
Where: Plain, Conconully, Orin-Rice Road, Chesaw Road, Nespelem, Twisp, Mazama, Highway 20 Wauconda Summit, Leavenworth, Oroville, Springdale-Hunters Road, Pangborn Airport, Sherman Pass, Number 2 Canyon, Wenatchee, Newport, Methow, Tonasket, Tiger, Fruitland, Cashmere, Wauconda, Stevens Pass, Northport, Omak, Inchelium, Entiat, Disautel Pass, Number 1 Canyon, Colville, Flowery Trail Road, Boulder Creek Road, Kettle Falls, Metaline, Okanogan, Brewster, Chelan, Metaline Falls, Deer Park, Republic, Bridgeport, Loup Loup Pass, Holden Village, Chewelah, Ione, Winthrop, and Stehekin.
When: Until 10 AM PST Friday.
Impacts: Periods of air stagnation can lead to the buildup of pollutants near the surface.
Additional Details: A brief push of northerly winds will arrive down the Okanogan Valley Thursday bringing the potential for temporary improvement to air quality.

Buildup of fine pollution particles can be harmful to those sensitive to air pollution including people with lung and heart problems, people with diabetes, children and the elderly.