Flash Flood in Lyon County, Minnesota
Flash Flood August 17, 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 caused inundation and persistent flooding of County Road 6 between U.S. Highway 59 and County Road 35, resulting in closing of the road for several hours.
The wider storm
During the overnight, a slow moving convective cluster within an environment with a strong low-level jet and abundant deep-layer moisture slid from western to southern Minnesota. Storms continually regenerated on the southwest flank of the cluster, with a boundary remaining stationary for several hours from south of Marshall to north of Westbrook. Some areas had more spotty heavy rainfall the prior night, and new rainfall amounts were generally from 2 to 4 inches in the band with radar estimates between of 4 to 6 inches. Numerous city and some rural roadways were inundated.
Began near Marshall (44.4170, -95.7835).
Source: NOAA Storm Events Database, event 1290893. Narratives are written by the National Weather Service forecast office that issued the report.
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