Flood — Stanley, South Dakota

2025-09-18 to 2025-09-19 · near Ft Pierre, Stanley, South Dakota

Event narrative

Stanley County Emergency Manager reports that Bad River Road has water over it in multiple locations and that residents were advised not to travel across parts of the county.

The Bad River river gauge at Fort Pierre would go into flood at 1230 CST, cresting at 24.14 or 3.14 feet above flood stage. The river would remain in flood into the morning of September 19th. At its crest, water was into some mobile homes along highway 83 in Fort Pierre, and the local shelter at the Expo Center was opened for those impacted.

Wider weather episode

Moderate to heavy rainfall occurred across a broad portion of Stanley and Dewey counties. The COOP observer 3 miles west southwest of Wendt would record a 2 day total of 4.94 while the CoCoRaHS observer in Fort Pierre received 4.06 over 3 days. This area had also received about an inch of rainfall on or around the 15th. Rainfall and saturated soils resulted in flooding of several streams and creeks, including the Bad River between Wendt and Fort Pierre, and Virgin Creek near Promise. Shelters were opened for homeowners impacted by rises in the Bad River in Fort Pierre, with portions of Bad River road seeing damage due to washouts. A stretch of BIA 8 east of Eagle Butte was also partly washed out.

View location on OpenStreetMap → (44.3600, -100.3900)

Source: NOAA Storm Events Database, event_id 1292965. Narrative written by the NWS forecast office that issued the report.