Air Stagnation Advisory
Status
Event Continued Active alertStart Time
Sun 12/14/2025 07:16 AM ESTEnd Time
Tue 12/16/2025 07:00 AM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Boise, ID ∙ Nampa, ID ∙ Meridian, ID ∙ Jordan Craters, OR ∙ Westfall, OR ∙ Wilder, ID ∙ Sweet, ID ∙ Idaho City, ID ∙ Jerome, ID ∙ Caldwell, IDFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Boise ID 516 AM MST Sun Dec 14 2025 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST /4 AM PST/ TUESDAY... * 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 5 AM MST /4 AM PST/ Tuesday. * 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
IDZ011-013-014-016-028-033-ORZ061>063-141715- /O.CON.KBOI.AS.Y.0004.000000T0000Z-251216T1200Z/ West Central Mountains-Boise Mountains-Upper Treasure Valley- Western Magic Valley-Camas Prairie-Upper Weiser River-Harney County-Baker County-Malheur County- Including the cities of Cascade, Anderson Dam, Cuprum, McCall, Cambridge, Ola, Corral, Hill City, Mesa, Twin Falls, New Princeton, Big Creek, Fairfield, Pine, Selby, Boise, Crane, Council, Indian Valley, Glendale, Warm Lake, Blaine, Burns, Fruitvale, Malheur City, Diamond, Soldier, Venator, Dunnean, Buchanan, Baker, Prairie, Goodrich, and Bear 516 AM MST Sun Dec 14 2025 /416 AM PST Sun Dec 14 2025/
