Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Cascade County below 5000ft; Meagher County Valleys |
| Effective: | 2026-10-25 @ 8:28 am -> 2026-10-25 @ 10:30 am |
| Onset: | 2026-10-25 @ 8:28 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-25 @ 8:28 am |
| Headline: | Special Weather Statement issued October 25 at 7:28AM MDT by NWS Great Falls MT |
| Description: |
Patchy dense fog will continue to be a concern for the remainder of the morning. Expect variable visibility reductions down to a quarter of a mile or less. Those traveling should be prepared for highly variable road conditions, including sharp visibility reductions across short distances. Also, frost deposition may cause slippery spots on area roads. Use low beam head lights, slow down and allow extra time to reach your destination. |
| Alert: | Dense Fog Advisory |
| Area(s): | Southern Rocky Mountain Front; Southern High Plains; Upper Blackfoot and MacDonald Pass; Gates of the Mountains; Helena Valley; Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Gallatin Valley; Northwest Beaverhead County; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-10-25 @ 5:34 am -> 2026-10-25 @ 12:00 pm |
| Onset: | 2026-10-25 @ 5:34 am -> 2026-10-25 @ 12:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-25 @ 5:34 am |
| Headline: | Dense Fog Advisory issued October 25 at 4:34AM MDT until October 25 at 11:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Visibility below a quarter of a mile at times in dense fog. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...Until 11 AM MDT this morning. * IMPACTS...Low visibility could make driving conditions hazardous. |
| Alert: | Special Weather Statement |
| Area(s): | Southern Rocky Mountain Front; Southern High Plains; Upper Blackfoot and MacDonald Pass; Gates of the Mountains; Helena Valley; Elkhorn and Boulder Mountains; Canyon Ferry Area |
| Effective: | 2026-10-25 @ 4:22 am -> 2026-10-25 @ 9:45 am |
| Onset: | 2026-10-25 @ 4:22 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-25 @ 4:22 am |
| Headline: | Special Weather Statement issued October 25 at 3:22AM MDT by NWS Great Falls MT |
| Description: |
Patchy dense fog has developed around Helena, Lincoln, Craig and Augusta this morning. Visibility is below a half mile in some areas. Those traveling early this morning should be alert for quickly changing visibility conditions. Reminder, reduce your driving speeds in areas of poor visibility. |
