Kooskia / leewikees

Air Stagnation Advisory issued January 15 at 10:57AM PST until January 20 at 4:00PM PST by NWS Missoula MT

* WHAT...Stagnation conditions will trap pollutants, leading to deteriorating air quality, particularly in lower elevations and valleys. * WHERE...Orofino/Grangeville Region, Southern Clearwater Mountains, and Northern Clearwater Mountains. * WHEN...Until 4 PM PST Tuesday. * IMPACTS...Periods of air stagnation can lead to the build up of pollutants near the surface.