Air Stagnation Advisory
Status
Event Continued Active alertStart Time
Wed 12/31/2025 06:30 AM ESTEnd Time
Sat 01/03/2026 10:00 AM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Boise, ID ∙ Nampa, ID ∙ Meridian, ID ∙ Wagontire Mountain, OR ∙ Ontario Municipal Airport, OR ∙ Fruitvale, ID ∙ Lucky Peak Lake, ID ∙ Calamity Butte, OR ∙ Wilder, ID ∙ Sweet, IDFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Boise ID 430 AM MST Wed Dec 31 2025 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 8 AM MST /7 AM PST/ SATURDAY... * 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 southwest Idaho and southeast Oregon. * WHEN...Until 8 AM MST /7 AM PST/ 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.
Technical Header
IDZ011>014-028-033-ORZ061-063-064-312200- /O.CON.KBOI.AS.Y.0005.000000T0000Z-260103T1500Z/ West Central Mountains-Lower Treasure Valley-Boise Mountains- Upper Treasure Valley-Camas Prairie-Upper Weiser River-Harney County-Malheur County-Oregon Lower Treasure Valley- Including the cities of Ola, McCall, Council, Warm Lake, Hill City, Fruitvale, Malheur City, Pine, Fairfield, Corral, Boise, Mesa, Caldwell, Diamond, Ontario, Cuprum, Buchanan, Goodrich, Big Creek, Crane, Cambridge, Blaine, Anderson Dam, Venator, Nyssa, New Princeton, Cascade, Prairie, Indian Valley, Bear, Selby, Soldier, Dunnean, Glendale, Burns, and Nampa 430 AM MST Wed Dec 31 2025 /330 AM PST Wed Dec 31 2025/
