Montana Severe Thunderstorm Warning | Effective 05/13/2026 16:59

Headline: 
Severe Thunderstorm Warning issued May 13 at 5:59PM MDT until May 13 at 6:30PM MDT by NWS Glasgow MT
Event: 
Severe Thunderstorm Warning
Urgency: 
Immediate
Effective: 
May 13, 2026 - 4:59pm
Expires: 
May 13, 2026 - 5:30pm
Description: 
At 559 PM MDT, severe thunderstorms were located along a line extending from 11 miles southeast of Zortman to 11 miles west of Mosby, moving northeast at 60 mph. HAZARD...70 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect considerable tree damage. Damage is likely to mobile homes, roofs, and outbuildings. Locations impacted include... Winnett, Flatwillow, Sand Springs, Devils Creek Rec Area, U L Bend Rec Area, Edwards, Mosby, Crooked Creek Rec Area, Petrolia Lake, Cat Creek, and Tiegen.
Instruction: 
For your protection move to an interior room on the lowest floor of a building.
Area Description: 
Garfield, MT; Petroleum, MT; Phillips, MT
Forcast Office: 
NWS Glasgow MT