Weather Warnings for Idaho

Issued by the National Weather Service

Current watches, warnings, and advisories for Idaho
Alerts Updated: January 31, 2026, 8:35 am  UTC


Air Stagnation Advisory issued January 31 at 1:35AM MST until February 6 at 11:00AM 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...Lower Treasure Valley Zones, and Upper Weiser River. * WHEN...From 5 AM MST /4 AM PST/ early this morning to 11 AM MST /10 AM PST/ Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Severity:  Moderate    Effective:  January 31, 2026, 1:35 am      Expires:  January 31, 2026, 2:00 pm
Area:  Lower Treasure Valley; Upper Weiser River; Oregon Lower Treasure Valley


Air Stagnation Advisory issued January 30 at 1:04PM MST until February 2 at 12:00PM MST by NWS Pocatello ID

Summary: * WHAT...Poor air quality will continue. This is due to an inversion and stagnant air conditions near the surface that will continue to trap pollutants. * WHERE...Franklin/Eastern Oneida Region and Lower Snake River Plain. * WHEN...Until noon MST Monday. * IMPACTS...Periods of air stagnation can lead to the buildup of pollutants near the surface.
Severity:  Moderate    Effective:  January 30, 2026, 1:04 pm      Expires:  February 2, 2026, 12:00 pm
Area:  Lower Snake River Plain; Franklin/Eastern Oneida Region