Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Dense Fog Advisory |
| Area(s): | Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Powder River; Carter; Northern Big Horn; Southern Rosebud; Southern Big Horn; Northeastern Yellowstone; Southwestern Yellowstone; Sheridan Foothills |
| Effective: | 2026-10-31 @ 10:12 pm -> 2026-11-01 @ 5:15 am |
| Onset: | 2026-10-31 @ 10:12 pm -> 2026-11-01 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-10-31 @ 10:12 pm |
| Headline: | Dense Fog Advisory issued October 31 at 9:12PM MDT until November 1 at 12:00PM MST by NWS Billings MT |
| Description: |
* WHAT...Pockets of dense fog with visibility down to one quarter mile or less at times. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...Until noon MST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Some roadways or bridges could be frost or ice covered and slippery. |
| Alert: | Dense Fog Advisory |
| Area(s): | Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Hill County; Northern Blaine County; Southern High Plains; Eastern Pondera and Eastern Teton; Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Cascade County below 5000ft; Judith Basin County and Judith Gap; Fergus County below 4500ft |
| Effective: | 2026-10-31 @ 12:30 pm -> 2026-11-01 @ 2:30 am |
| Onset: | 2026-10-31 @ 10:00 pm -> 2026-11-01 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-31 @ 12:30 pm |
| Headline: | Dense Fog Advisory issued October 31 at 11:30AM MDT until November 1 at 12:00PM MST by NWS Great Falls MT |
| Description: |
* WHAT...Visibility to as low as one quarter of a mile in dense fog. * WHERE...A portion of north central Montana. * WHEN...From 9 PM MDT this evening to noon MST Sunday. * IMPACTS...Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Bridge and overpasses could become slippery. |
