May 31, 2018
Several severe thunderstorms moved across the Billings Forecast Area during the late afternoon into the evening hours of the 31st. The most notable severe thunderstorm moved across the Roundup area. This thunderstorm produced very large hail along with flash flooding. A damage survey was conducted which found that a majority of homes and businesses within Roundup experienced some type of hail damage. Damage was to the north and west facing aspects of homes and businesses with numerous broken win
Source: NOAA National Weather Service Storm Events Database (event 760904). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Musselshell County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.