Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Winter Weather Advisory |
| Area(s): | Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-10-26 @ 4:19 am -> 2026-10-26 @ 7:00 pm |
| Onset: | 2026-10-26 @ 10:00 pm -> 2026-10-27 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-26 @ 4:19 am |
| Headline: | Winter Weather Advisory issued October 26 at 3:19AM MDT until October 27 at 6:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Snow expected. Total snow accumulations 2 to 5 inches. Winds gusting as high as 40 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 9 PM this evening to 6 AM MDT Tuesday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. |
| Alert: | Dense Fog Advisory |
| Area(s): | Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Madison River Valley; Gallatin Valley; Northwest Beaverhead County; Beaverhead and Western Madison below 6000ft; Gallatin and Madison County Mountains and Centennial Mountains |
| Effective: | 2026-10-26 @ 1:42 am -> 2026-10-26 @ 1:00 pm |
| Onset: | 2026-10-26 @ 1:42 am -> 2026-10-26 @ 1:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-10-26 @ 1:42 am |
| Headline: | Dense Fog Advisory issued October 26 at 12:42AM MDT until October 26 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Visibility one quarter mile or less in dense fog. * WHERE...Canyon Ferry Area, Elkhorn and Boulder Mountains, Beaverhead and Western Madison below 6000ft, Gallatin Valley, Gallatin and Madison County Mountains and Centennial Mountains, Madison River Valley, Missouri Headwaters, and Northwest Beaverhead County. * WHEN...Until noon MDT today. * IMPACTS...Low visibility could make driving conditions hazardous. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone |
| Effective: | 2026-10-26 @ 12:05 am -> 2026-10-27 @ 5:00 am |
| Onset: | 2026-10-26 @ 12:05 am -> 2026-10-27 @ 5:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-10-26 @ 12:05 am |
| Headline: | Lake Wind Advisory issued October 25 at 11:05PM MDT until October 27 at 4:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Southeast winds 15 to 25 mph with gusts up to 35 mph. * WHERE...Fort Peck Lake. * WHEN...Until 4 AM MDT Tuesday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Expect wave heights up to 4 feet. |
