Air Stagnation Advisory issued December 01 at 1:29PM MST until December 05 at 11:00AM MST by NWS

Weather Alerts | Montana

Dec 1, 2020

...AIR STAGNATION ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 11 AM MST SATURDAY... * WHAT...Deteriorating air quality due to light winds and reduced vertical mixing expected. *…