Air Stagnation Advisory
Status
Event Extended (Time) Active alertStart Time
Tue 12/30/2025 03:25 PM ESTEnd Time
Sat 01/03/2026 10:00 AM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Boise, ID ∙ Nampa, ID ∙ Meridian, ID ∙ Blue Mountain, OR ∙ Mahogany Mountain, OR ∙ Bowmont, ID ∙ McCall, ID ∙ Atlanta, ID ∙ Harney Lake, OR ∙ Ontario, ORFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Boise ID 125 PM MST Tue Dec 30 2025 ...AIR STAGNATION ADVISORY NOW IN EFFECT UNTIL 8 AM MST /7 AM PST/ 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...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
IDZ012-014-028-033-ORZ061-063-064-311300- /O.EXT.KBOI.AS.Y.0005.000000T0000Z-260103T1500Z/ Lower Treasure Valley-Upper Treasure Valley-Camas Prairie-Upper Weiser River-Harney County-Malheur County-Oregon Lower Treasure Valley- Including the cities of Boise, Hill City, Burns, Dunnean, Fairfield, Soldier, New Princeton, Venator, Corral, Blaine, Nampa, Malheur City, Fruitvale, Nyssa, Diamond, Council, Caldwell, Indian Valley, Goodrich, Selby, Ontario, Crane, Buchanan, Mesa, Glendale, and Cambridge 125 PM MST Tue Dec 30 2025 /1225 PM PST Tue Dec 30 2025/
