Flash Flood — Lyman, South Dakota

2025-08-03 · near Lower Brule, Lyman, South Dakota

Event narrative

A trained spotter reported water flowing over the roads in West Brule.

Wider weather episode

Scattered thunderstorms on the afternoon of August 3rd produced large hail and caused flash flooding in Lyman County. Heavy rainfall from these storms led to a trained spotter reporting water flowing over roads in West Brule.

View location on OpenStreetMap → (44.0800, -99.6500)

Source: NOAA Storm Events Database, event_id 1289327. Narrative written by the NWS forecast office that issued the report.