Cheyenne, Wyoming
Regional Weather Alerts
| Alert: | Dense Fog Advisory |
| Area(s): | Musselshell; Treasure; Northern Stillwater; Golden Valley; Northern Big Horn; Southern Rosebud; Judith Gap; Southern Big Horn; Northern Sweet Grass; Northern Carbon; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Sheridan Foothills |
| Effective: | 2026-09-21 @ 5:57 am -> 2026-09-21 @ 11:00 am |
| Onset: | 2026-09-21 @ 5:57 am -> 2026-09-21 @ 11:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-09-21 @ 5:57 am |
| Headline: | Dense Fog Advisory issued September 21 at 4:57AM MDT until September 21 at 10:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Areas of dense fog producing visibility one quarter mile or less. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...Until 10 AM MDT this morning. * IMPACTS...Morning travelers can expect to encounter areas of very poor visibility. This includes portions of Interstate 90 from Big Timber to Billings, Hardin and Sheridan. Portions of Interstate 94, US-191, and US-212 will also be impacted. Please use caution and allow extra time for your morning commute. * ADDITIONAL DETAILS...Fog will slowly dissipate in the mid to late morning. |