Flash Flood in Lyon County, Minnesota

Flash Flood July 18, 2025 · Lyon County, Minnesota

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

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

The wider storm

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.

Began near Marshall (44.4545, -95.7908).

Source: NOAA Storm Events Database, event 1287239. Narratives are written by the National Weather Service forecast office that issued the report.

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