Air Stagnation Advisory
Status
Event Continued Active alertStart Time
Sun 01/18/2026 06:14 PM ESTEnd Time
Thu 01/22/2026 01:00 PM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Boise, ID ∙ Nampa, ID ∙ Meridian, ID ∙ Foster Lake, OR ∙ Castle Rock, OR ∙ Jordan Valley, OR ∙ Emmett, ID ∙ Payette Lake, ID ∙ Snowyside Peak, ID ∙ Bowden Hills, ORFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Boise ID 414 PM MST Sun Jan 18 2026 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST /10 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 southwest Idaho and northeast and southeast Oregon. * WHEN...Until 11 AM MST /10 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
IDZ011>014-028-033-ORZ061>064-191800- /O.CON.KBOI.AS.Y.0001.000000T0000Z-260122T1800Z/ West Central Mountains-Lower Treasure Valley-Boise Mountains- Upper Treasure Valley-Camas Prairie-Upper Weiser River-Harney County-Baker County-Malheur County-Oregon Lower Treasure Valley- Including the cities of Cascade, Fairfield, New Princeton, Selby, Mesa, Ontario, Warm Lake, Dunnean, Burns, Prairie, Venator, McCall, Blaine, Hill City, Diamond, Ola, Big Creek, Malheur City, Glendale, Bear, Council, Goodrich, Buchanan, Pine, Caldwell, Boise, Corral, Crane, Cuprum, Indian Valley, Soldier, Anderson Dam, Baker, Fruitvale, Cambridge, Nampa, and Nyssa 414 PM MST Sun Jan 18 2026 /314 PM PST Sun Jan 18 2026/
