Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Dense Fog Advisory |
| Area(s): | Canyon Ferry Area; Missouri Headwaters; Gallatin Valley |
| Effective: | 2026-10-14 @ 12:10 am -> 2026-10-14 @ 1:00 pm |
| Onset: | 2026-10-14 @ 12:10 am -> 2026-10-14 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-14 @ 12:10 am |
| Headline: | Dense Fog Advisory issued October 13 at 11:10PM MDT until October 14 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Highly variable visibility as low as one quarter of a mile in dense fog. * WHERE...Canyon Ferry Area, Gallatin Valley, and Missouri Headwaters. * WHEN...Until noon MDT Wednesday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Below freezing temperatures tonight may lead to a glaze of ice on surfaces, most notably on bridges and overpasses. |