Weather Warnings for Idaho

Issued by the National Weather Service

Current watches, warnings, and advisories for Idaho
Alerts Updated: December 30, 2025, 9:59 am  UTC


Air Stagnation Advisory issued December 30 at 2:58AM MST until January 3 at 5:00AM MST by NWS Boise ID

Summary: * 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/ Saturday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Severity:  Moderate    Effective:  December 30, 2025, 2:58 am      Expires:  December 30, 2025, 3:00 pm
Area:  Lower Treasure Valley; Upper Treasure Valley; Western Magic Valley; Camas Prairie; Upper Weiser River; Harney County; Baker County; Malheur County; Oregon Lower Treasure Valley


Air Stagnation Advisory issued December 29 at 11:45AM PST until January 1 at 12:00PM PST by NWS Spokane WA

Summary: * WHAT...Stagnant conditions will have potential to trap pollutants near the ground with deteriorated air quality. * WHERE...Portions of North and North Central Idaho and North Central, Northeast, and Southeast Washington. * WHEN...Until noon PST Thursday. * IMPACTS...Periods of air stagnation can lead to the buildup of pollutants near the surface.
Severity:  Moderate    Effective:  December 29, 2025, 11:45 am      Expires:  January 1, 2026, 12:00 pm
Area:  Central Panhandle Mountains; Lewiston Area; Lewis and Southern Nez Perce Counties; Lower Garfield and Asotin Counties; Spokane Area; Northeast Mountains; Okanogan Highlands; Wenatchee Area; Okanogan Valley; Central Chelan County; Western Chelan County; Western Okanogan County


Air Stagnation Advisory issued December 29 at 11:23AM PST until January 1 at 12:00PM PST by NWS Missoula MT

Summary: * WHAT...Stagnation conditions will trap pollutants, leading to deteriorating air quality. * WHERE...Lower Hells Canyon/Salmon River Region, Orofino/Grangeville Region, Southern Clearwater Mountains, and Northern Clearwater Mountains. * WHEN...Until noon PST Thursday. * IMPACTS...Periods of air stagnation can lead to the build up of pollutants near the surface.
Severity:  Moderate    Effective:  December 29, 2025, 11:23 am      Expires:  January 1, 2026, 12:00 pm
Area:  Northern Clearwater Mountains; Southern Clearwater Mountains; Orofino/Grangeville Region; Lower Hells Canyon/Salmon River Region