Active Weather Alerts
Air Stagnation Advisory
Issued: 8:25 PM Dec. 30, 2025 – National Weather Service
...AIR STAGNATION ADVISORY IN EFFECT UNTIL 8 AM MST SATURDAY... * WHAT...A period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Boise Mountains and West Central Mountains. * WHEN...Until 8 AM MST Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. PRECAUTIONARY/PREPAREDNESS ACTIONS... Persons with respiratory illness should follow their physicians advice for dealing with high levels of air pollution during periods of stagnant air. &&
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