Aug 24, 2022
A supercell thunderstorm developed over the southern Black Hills and tracked southeast, weakening on the adjacent plains. The storm produced large hail and heavy rain over the area. Other strong thunderstorms produced heavy rain and localized flash flooding over far southwestern South Dakota. Rain amounts of three to four inches were estimated in some areas. In Oglala Lakota County, flash flooding quickly occurred in Porcupine, with water running over roads. In Custer County, Hopkins Flat Road w
Source: NOAA National Weather Service Storm Events Database (event 1045787). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Custer County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.