Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Treasure |
| Effective: | 2026-08-17 @ 5:27 pm -> 2026-08-17 @ 6:00 pm |
| Onset: | 2026-08-17 @ 5:27 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-17 @ 5:27 pm |
| Headline: | Special Weather Statement issued August 17 at 4:27PM MDT by NWS Billings MT |
| Description: |
At 427 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles southwest of Hysham, moving east at 35 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... Hysham and areas along I-94. |
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Cascade, MT; Chouteau, MT |
| Effective: | 2026-08-17 @ 5:26 pm -> 2026-08-17 @ 5:36 pm |
| Onset: | 2026-08-17 @ 5:26 pm -> 2026-08-17 @ 5:30 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Great Falls MT on 2026-08-17 @ 5:26 pm |
| Headline: | Severe Thunderstorm Warning issued August 17 at 4:26PM MDT until August 17 at 4:30PM MDT by NWS Great Falls MT |
| Description: |
The storm which prompted the warning has weakened below severe limits, and no longer poses an immediate threat to life or property. Therefore, the warning will be allowed to expire. However, small hail, gusty winds and heavy rain are still possible with this thunderstorm. |
| Alert: | Special Weather Statement |
| Area(s): | Butte/Blackfoot Region |
| Effective: | 2026-08-17 @ 5:26 pm -> 2026-08-17 @ 6:00 pm |
| Onset: | 2026-08-17 @ 5:26 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-08-17 @ 5:26 pm |
| Headline: | Special Weather Statement issued August 17 at 4:26PM MDT by NWS Missoula MT |
| Description: |
At 426 PM MDT, Trained spotters reported a shower 6 miles northwest of Divide, or 19 miles southwest of Butte, moving east at 40 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Trained spotters reported. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Butte, Silver Bow, Walkerville, Divide, Newcomb, Nissler, Ramsay and Janney. |
| Alert: | Special Weather Statement |
| Area(s): | Western and Central Chouteau County; Cascade County below 5000ft; Little Belt and Highwood Mountains |
| Effective: | 2026-08-17 @ 5:26 pm -> 2026-08-17 @ 6:15 pm |
| Onset: | 2026-08-17 @ 5:26 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-17 @ 5:26 pm |
| Headline: | Special Weather Statement issued August 17 at 4:26PM MDT by NWS Great Falls MT |
| Description: |
At 425 PM MDT, Doppler radar was tracking a strong thunderstorm 10 miles west of Highwood, or 15 miles northeast of Great Falls, moving southeast 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... Highwood. |
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Garfield, MT; Phillips, MT; Valley, MT |
| Effective: | 2026-08-17 @ 5:15 pm -> 2026-08-17 @ 5:45 pm |
| Onset: | 2026-08-17 @ 5:15 pm -> 2026-08-17 @ 5:45 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Glasgow MT on 2026-08-17 @ 5:15 pm |
| Headline: | Severe Thunderstorm Warning issued August 17 at 4:15PM MDT until August 17 at 4:45PM MDT by NWS Glasgow MT |
| Description: |
At 414 PM MDT, a severe thunderstorm was located over Devils Creek Rec Area, or 41 miles northwest of Jordan, moving southeast at 40 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... Devils Creek Rec Area. |
| Alert: | Special Weather Statement |
| Area(s): | Musselshell; Northeastern Yellowstone |
| Effective: | 2026-08-17 @ 4:41 pm -> 2026-08-17 @ 5:30 pm |
| Onset: | 2026-08-17 @ 4:41 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-17 @ 4:41 pm |
| Headline: | Special Weather Statement issued August 17 at 3:41PM MDT by NWS Billings MT |
| Description: |
At 341 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles south of Roundup, moving southeast at 35 mph. HAZARD...Wind gusts up to 40 mph and pea size hail. Very heavy rainfall. SOURCE...Radar indicated. IMPACT...Motorists on US-87 south of Roundup may see significant ponding of water on the roadway. Locations impacted include... Klein. |
| Alert: | Special Weather Statement |
| Area(s): | Judith Basin County and Judith Gap; Fergus County below 4500ft; Snowy and Judith Mountains |
| Effective: | 2026-08-17 @ 4:39 pm -> 2026-08-17 @ 5:30 pm |
| Onset: | 2026-08-17 @ 4:39 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-17 @ 4:39 pm |
| Headline: | Special Weather Statement issued August 17 at 3:39PM MDT by NWS Great Falls MT |
| Description: |
At 339 PM MDT, Doppler radar was tracking a cluster of strong thunderstorms near Hobson, or 22 miles southeast of Stanford, moving east at 35 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... Hobson, Moore, Ackley Lake State Park, Buffalo, and Garneill. |