May 29, 2019
Several days of heavy rain, along with major to record flooding the previous week, led to more flooding across portions of the western South Dakota plains and foothills of the Black Hills. The period of wet weather culminated with heavy rain and thunderstorms over the Rapid City area during the afternoon and evening of May 31, which led to widespread flooded roads.
Source: NOAA National Weather Service Storm Events Database (event 831888). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Ziebach County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.