Air Stagnation Advisory
Status
Event Extended (Time) Active alertStart Time
Mon 01/12/2026 01:50 PM ESTEnd Time
Mon 01/19/2026 07:00 AM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Boise, ID ∙ Nampa, ID ∙ Meridian, ID ∙ Wagontire, OR ∙ Harper, OR ∙ New Plymouth, ID ∙ Ola, ID ∙ Hot Springs, ID ∙ Twin Falls, ID ∙ Harney, ORFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Boise ID 1150 AM MST Mon Jan 12 2026 ...AIR STAGNATION ADVISORY NOW IN EFFECT UNTIL 5 AM MST /4 AM PST/ MONDAY... * 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/ Monday. * 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>014-016-028-033-ORZ061>064-132100- /O.EXT.KBOI.AS.Y.0001.000000T0000Z-260119T1200Z/ West Central Mountains-Lower Treasure Valley-Boise Mountains- 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 Ola, Dunnean, Nampa, New Princeton, Selby, Cuprum, Fruitvale, Soldier, Mesa, Buchanan, Burns, Fairfield, Malheur City, Cascade, Bear, Blaine, Anderson Dam, Pine, Hill City, Council, Warm Lake, Cambridge, Diamond, Glendale, Baker, Crane, Boise, Twin Falls, Big Creek, Caldwell, McCall, Goodrich, Indian Valley, Prairie, Ontario, Venator, Nyssa, and Corral 1150 AM MST Mon Jan 12 2026 /1050 AM PST Mon Jan 12 2026/
