Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Missoula/Bitterroot Valleys; Bitterroot/Sapphire Mountains |
| Effective: | 2026-08-15 @ 7:35 pm -> 2026-08-15 @ 8:00 pm |
| Onset: | 2026-08-15 @ 7:35 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-15 @ 7:35 pm |
| Headline: | Special Weather Statement issued August 15 at 6:35PM MDT by NWS Missoula MT |
| Description: |
At 635 PM MDT, Doppler radar was tracking a strong thunderstorm 5 miles southwest of Hamilton, moving northeast at 25 mph. HAZARD...Wind gusts up to 40 mph, half inch size hail, and lightning. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Hamilton, Woodside, Grantsdale, Charlos Heights, Como and Corvallis. |
| Alert: | Special Weather Statement |
| Area(s): | Meagher County Valleys |
| Effective: | 2026-08-15 @ 7:33 pm -> 2026-08-15 @ 8:00 pm |
| Onset: | 2026-08-15 @ 7:33 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-15 @ 7:33 pm |
| Headline: | Special Weather Statement issued August 15 at 6:33PM MDT by NWS Great Falls MT |
| Description: |
At 633 PM MDT, Doppler radar was tracking a strong thunderstorm 21 miles west of Harlowton, moving south at 10 mph. HAZARD...Wind gusts up to 50 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... Martinsdale. |
| Alert: | Special Weather Statement |
| Area(s): | Northern Clearwater Mountains; Lower Clark Fork Region; Bitterroot/Sapphire Mountains |
| Effective: | 2026-08-15 @ 7:22 pm -> 2026-08-15 @ 7:45 pm |
| Onset: | 2026-08-15 @ 7:22 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-15 @ 7:22 pm |
| Headline: | Special Weather Statement issued August 15 at 6:22PM MDT by NWS Missoula MT |
| Description: |
At 622 PM MDT /522 PM PDT/, Doppler radar was tracking a line of strong thunderstorms extending from 6 miles west of Alberton to 29 miles south of Alberton, or extending from 19 miles southeast of Superior to 33 miles northwest of Hamilton, moving east at 20 mph. HAZARD...Wind gusts up to 50 mph and half inch size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Alberton, Lolo Hot Springs, Cyr, Lolo Pass and Ninemile. |
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Wheatland, MT |
| Effective: | 2026-08-15 @ 7:18 pm -> 2026-08-15 @ 7:45 pm |
| Onset: | 2026-08-15 @ 7:18 pm -> 2026-08-15 @ 7:45 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Billings MT on 2026-08-15 @ 7:18 pm |
| Headline: | Severe Thunderstorm Warning issued August 15 at 6:18PM MDT until August 15 at 6:45PM MDT by NWS Billings MT |
| Description: |
At 618 PM MDT, a severe thunderstorm was located 21 miles west of Harlowton, moving south at 10 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Mainly rural areas of West Central Wheatland County. |
| Alert: | Special Weather Statement |
| Area(s): | Lower Clark Fork Region |
| Effective: | 2026-08-15 @ 7:08 pm -> 2026-08-15 @ 7:45 pm |
| Onset: | 2026-08-15 @ 7:08 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-15 @ 7:08 pm |
| Headline: | Special Weather Statement issued August 15 at 6:08PM MDT by NWS Missoula MT |
| Description: |
At 608 PM MDT, Doppler radar was tracking a strong thunderstorm 18 miles south of Tarkio, or 29 miles west of Missoula, moving east at 5 mph. HAZARD...Wind gusts up to 40 mph and half inch size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Mainly rural areas of Southeastern Mineral and Southwestern Missoula Counties. |