Flash Flood in Beadle County, South Dakota

Flash Flood August 21, 2025 – August 22, 2025 · Beadle County, South Dakota

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

What the National Weather Service wrote

Much of a one-mile stretch of 196th Street was inundated by water east of 409th Avenue. Several other county gravel roads had sections under water.

The wider storm

Clusters of slow moving thunderstorms with embedded supercells developed within an environment of 40 kts of deep-layer shear and 2000 J/kg MLCAPE as a mid-level wave moved across the region. Isolated stronger storms had persistent enough updrafts to produce large hail, along with pockets of heavier rainfall of up to 5 to 7 inches in parts of Beadle County.

Began near Bloomfield (44.5462, -98.0368).

Source: NOAA Storm Events Database, event 1290936. Narratives are written by the National Weather Service forecast office that issued the report.

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