Flash Flood — Lyon, Minnesota

2025-07-18 · near Marshall, Lyon, Minnesota

Event narrative

Heavy rainfall from 4 to 8 inches in just a couple of hours led to flooding of numerous roads around Marshall.

Wider weather episode

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.

View location on OpenStreetMap → (44.4545, -95.7908)

Source: NOAA Storm Events Database, event_id 1287239. Narrative written by the NWS forecast office that issued the report.