Flash Flood — Marshall, South Dakota

2025-08-15 · near Britton, Marshall, South Dakota

Event narrative

Total rainfall in Britton over a 48-hour period exceeded 4.5 inches, overwhelming city drainage systems. This caused flooding in town, with up to six inches of water moving over roads and into some buildings and basements.

Wider weather episode

Strong storms during the early morning hours of August 15th would generate winds in excess of 70 mph at Sunset Colony, and half-dollar to ping pong sized hail observed by the Marshall County Emergency Manager in Britton. Total rainfall in Britton over a 48 hour period exceeded 4.5 inches, with this latest round of storms overwhelming drainage systems and causing flooding in town.

View location on OpenStreetMap → (45.7700, -97.7200)

Source: NOAA Storm Events Database, event_id 1293391. Narrative written by the NWS forecast office that issued the report.