Flood in Hamlin County, South Dakota

Flood August 1, 2025 · Hamlin County, South Dakota

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

The wider storm

Flooding on the Big Sioux River near Castlewood, which began in late July, continued into August. The river started the month at 9.4 feet, or 0.4 feet above flood stage, before falling below flood stage at 5:00 a.m. CST on August 1st.

Began near Appleby (44.8000, -97.0300).

Source: NOAA Storm Events Database, event 1290203. Narratives are written by the National Weather Service forecast office that issued the report.

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