Flash Flood — Lyon, Minnesota

2025-08-17 · near Marshall, Lyon, Minnesota

Event narrative

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.

Wider weather episode

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.

View location on OpenStreetMap → (44.4170, -95.7835)

Source: NOAA Storm Events Database, event_id 1290893. Narrative written by the NWS forecast office that issued the report.