Moderate Expected Likely Air Stagnation Advisory Air Stagnation Advisory issued February 5 at 1:27PM MST until February 9 at 5:00AM MST by NWS Boise ID Feb 5, 1:27 PM → Feb 9, 5:00 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 south central and southwest Idaho andnortheast and southeast Oregon. WHEN: Until 5 AM MST /4 AM PST/ Monday. 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: Feb 5, 6:33 PM Source: NWS Alert