Flood — Hamlin, South Dakota

2025-08-01 · near Appleby, Hamlin, South Dakota

Wider weather episode

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.

View location on OpenStreetMap → (44.8000, -97.0300)

Source: NOAA Storm Events Database, event_id 1290203. Narrative written by the NWS forecast office that issued the report.