Moderate Expected Likely Air Stagnation Advisory Air Stagnation Advisory issued January 19 at 10:39AM MST until January 22 at 11:00AM MST by NWS Boise ID Jan 19, 10:39 AM → Jan 22, 11:00 AM WHAT: An extended period of stagnant air, with light winds andlittle vertical mixing. This is due to an inversion near thesurface that will continue to trap pollutants. WHERE: Portions of southwest Idaho and northeast and southeastOregon. WHEN: Until 11 AM MST /10 AM PST/ Thursday. IMPACTS: Poor air quality may cause issues for people withrespiratory problems. + Read More Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air. Updated: Jan 19, 6:50 PM Source: NWS Alert