7/31/2025 10:47:00 PM until 7/31/2025 11:30:00 PM

This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. Torrential rainfall is also occurring with this storm and may lead to flash flooding. Do not drive your vehicle through flooded roadways.

At 1047 PM MDT, Doppler radar was tracking a strong thunderstorm 11 miles northeast of Ashland, or 25 miles southeast of Colstrip, moving east at 15 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 damage to outdoor objects is possible. Locations impacted include... Mainly rural areas of Southwestern Custer and Northwestern Powder River Counties.