Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft |
| Effective: | 2026-06-25 @ 6:30 pm -> 2026-06-25 @ 7:30 pm |
| Onset: | 2026-06-25 @ 6:30 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-06-25 @ 6:30 pm |
| Headline: | Special Weather Statement issued June 25 at 5:30PM MDT by NWS Great Falls MT |
| Description: |
At 530 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 21 miles southeast of Big Sandy to 27 miles northeast of Geraldine to 17 miles west of Winifred. Movement was east at 30 mph. HAZARD...Wind gusts up to 50 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Winifred, Judith Landing, and Iliad. |
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Blaine, MT; Chouteau, MT |
| Effective: | 2026-06-25 @ 6:18 pm -> 2026-06-25 @ 7:00 pm |
| Onset: | 2026-06-25 @ 6:18 pm -> 2026-06-25 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Great Falls MT on 2026-06-25 @ 6:18 pm |
| Headline: | Severe Thunderstorm Warning issued June 25 at 5:18PM MDT until June 25 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
At 518 PM MDT, a severe thunderstorm was located 20 miles south of Parker School, or 23 miles southeast of Big Sandy, moving east at 15 mph. HAZARD...Quarter size hail. SOURCE...Radar indicated. IMPACT...Damage to vehicles is expected. This severe thunderstorm will remain over mainly rural areas of southwestern Blaine and east central Chouteau Counties. |
| Alert: | Special Weather Statement |
| Area(s): | Eastern Toole and Liberty |
| Effective: | 2026-06-25 @ 6:05 pm -> 2026-06-25 @ 7:00 pm |
| Onset: | 2026-06-25 @ 6:05 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-06-25 @ 6:05 pm |
| Headline: | Special Weather Statement issued June 25 at 5:05PM MDT by NWS Great Falls MT |
| Description: |
At 505 PM MDT, Doppler radar was tracking a strong thunderstorm 22 miles east of Sunburst, or 36 miles northeast of Shelby, moving east at 10 mph. HAZARD...Wind gusts up to 40 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Whitlash. |
| Alert: | Winter Storm Watch |
| Area(s): | Bitterroot/Sapphire Mountains |
| Effective: | 2026-06-25 @ 12:56 pm -> 2026-06-27 @ 4:00 pm |
| Onset: | 2026-06-27 @ 7:00 pm -> 2026-06-29 @ 10:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-06-25 @ 12:56 pm |
| Headline: | Winter Storm Watch issued June 25 at 11:56AM MDT until June 29 at 9:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Heavy wet snow possible above 6500 feet. Total snow accumulations up to 8 inches possible. * WHERE...Backcountry and higher elevation areas. * WHEN...From Saturday evening through Monday morning. * IMPACTS...Plan for winter-like conditions in the backcountry and higher elevations. Cold temperatures and wet snow will elevate the risk of hypothermia. Heavy wet snow may down trees, blocking access to backcountry roadways. |
| Alert: | Winter Storm Watch |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-06-25 @ 12:56 pm -> 2026-06-27 @ 4:00 pm |
| Onset: | 2026-06-27 @ 7:00 pm -> 2026-06-29 @ 10:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-06-25 @ 12:56 pm |
| Headline: | Winter Storm Watch issued June 25 at 11:56AM MDT until June 29 at 9:00AM MDT by NWS Missoula MT |
| Description: |
* WHAT...Heavy wet snow possible above 6500 feet. Total snow accumulations up to 6 inches, with higher amounts across the Anaconda and Pintler Mountains possible. * WHERE...Backcountry and higher elevation areas, Georgetown Lake. * WHEN...From Saturday evening through Monday morning. * IMPACTS...Plan for winter-like conditions in the backcountry and higher elevations. Cold temperatures and wet snow will elevate the risk of hypothermia. Heavy wet snow may down trees, blocking access to backcountry roadways. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone |
| Effective: | 2026-06-25 @ 12:25 pm -> 2026-06-25 @ 11:00 pm |
| Onset: | 2026-06-25 @ 12:25 pm -> 2026-06-25 @ 11:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-06-25 @ 12:25 pm |
| Headline: | Lake Wind Advisory issued June 25 at 11:25AM MDT until June 25 at 10:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Southeast winds 15 to 20 mph with gusts up to 30 mph. * WHERE...Fort Peck Lake. * WHEN...Until 10 PM MDT this evening. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Wave heights to 3 feet are expected. |