Jun 25, 2020
A severe thunderstorm developed in the Custer area and remained nearly stationary for close to an hour and a half. The storm produced a lot of hail around quarter size, which accumulated six inches deep in some areas. The large amounts of hail and heavy rain also caused flash flooding on the east side of Custer.
Source: NOAA National Weather Service Storm Events Database (event 904934). 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.