Jul 18, 2025
A cluster of thunderstorms developed north of U.S. Highway 14 near the South Dakota-Minnesota border during the evening of July 18. These thunderstorms drifted south and east along a slow-moving surface boundary and began to train/back-build across the Marshall, MN area. Four to eight inches of rain fell within 2 to 3 hours, resulting in significant flash flooding across the city, especially for areas south and east of downtown.
Source: NOAA National Weather Service Storm Events Database (event 1287239). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Lyon County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.