Jun 28, 2025
A volatile atmospheric setup on the afternoon and evening of June 28th led to the development of several powerful supercell thunderstorms across far eastern South Dakota. These storms produced multiple tornadoes, including two that caused significant damage in Deuel County. The strongest tornado was rated as a high-end EF3. Storms also produced large hail and instances of flash flooding from heavy rainfall.
Source: NOAA National Weather Service Storm Events Database (event 1275278). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Deuel County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.