Air Stagnation Advisory
Status
Event Continued Active alertStart Time
Mon 12/29/2025 04:49 AM ESTEnd Time
Thu 01/01/2026 12:00 PM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Boise, ID ∙ Nampa, ID ∙ Meridian, ID ∙ Crane, OR ∙ Cornucopia, OR ∙ Murphy, ID ∙ Hammett, ID ∙ Alvord Lake, OR ∙ Ironside Mountain, OR ∙ Ontario, ORFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Boise ID 249 AM MST Mon Dec 29 2025 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM MST /9 AM PST/ THURSDAY... * WHAT...An extended 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...Portions of south central and southwest Idaho and northeast and southeast Oregon. * WHEN...Until 10 AM MST /9 AM PST/ Thursday. * 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.
Technical Header
IDZ012-014-016-028-033-ORZ061>064-292100- /O.CON.KBOI.AS.Y.0005.000000T0000Z-260101T1700Z/ Lower Treasure Valley-Upper Treasure Valley-Western Magic Valley- Camas Prairie-Upper Weiser River-Harney County-Baker County- Malheur County-Oregon Lower Treasure Valley- Including the cities of Indian Valley, Ontario, Fruitvale, Caldwell, Boise, Malheur City, Hill City, Nyssa, Council, Dunnean, Crane, Buchanan, Selby, Nampa, Blaine, Corral, Mesa, Cambridge, Venator, Twin Falls, Goodrich, Burns, Soldier, Baker, Fairfield, Glendale, Diamond, and New Princeton 249 AM MST Mon Dec 29 2025 /149 AM PST Mon Dec 29 2025/
