Boise, Idaho
Regional Weather Alerts
| Alert: | Air Stagnation Advisory |
| Area(s): | Lower Treasure Valley; Upper Weiser River; Oregon Lower Treasure Valley |
| Effective: | 2026-01-31 @ 2:35 am -> 2026-02-06 @ 12:00 pm |
| Onset: | 2026-01-31 @ 6:00 am -> 2026-01-31 @ 3:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Boise ID on 2026-01-31 @ 2:35 am |
| Headline: | Air Stagnation Advisory issued January 31 at 1:35AM MST until February 6 at 11:00AM MST by NWS Boise ID |
| Description: |
* 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. |
| Alert: | Air Stagnation Advisory |
| Area(s): | Lower Snake River Plain; Franklin/Eastern Oneida Region |
| Effective: | 2026-01-30 @ 2:04 pm -> 2026-02-02 @ 1:00 pm |
| Onset: | 2026-01-30 @ 2:04 pm -> 2026-02-02 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Pocatello ID on 2026-01-30 @ 2:04 pm |
| Headline: | Air Stagnation Advisory issued January 30 at 1:04PM MST until February 2 at 12:00PM MST by NWS Pocatello ID |
| Description: |
* 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. |