Air Stagnation Advisory
Status
Event Continued Active alertStart Time
Mon 12/15/2025 10:56 PM ESTEnd Time
Tue 12/16/2025 07:00 AM ESTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Boise, ID ∙ Nampa, ID ∙ Meridian, ID ∙ Castleford, ID ∙ Pueblo Valley, OR ∙ Juntura, OR ∙ Ontario, OR ∙ Council, ID ∙ Lake Cascade, ID ∙ Wagontire Mountain, ORFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Boise ID 856 PM MST Mon Dec 15 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 southwest Idaho 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>013-033-ORZ064-161200- /O.CON.KBOI.AS.Y.0004.000000T0000Z-251216T1200Z/ West Central Mountains-Lower Treasure Valley-Boise Mountains- Upper Weiser River-Oregon Lower Treasure Valley- Including the cities of Glendale, Cascade, Warm Lake, Prairie, Big Creek, Indian Valley, Mesa, Caldwell, Goodrich, Fruitvale, Ontario, Anderson Dam, Pine, McCall, Ola, Nyssa, Nampa, Cuprum, Council, Bear, and Cambridge 856 PM MST Mon Dec 15 2025 /756 PM PST Mon Dec 15 2025/
