Jun 21, 2024
Clusters of thunderstorms with very high rainfall rates from 2 to 4 inches per hour developed by midday on June 20, and despite being transient, continued to redevelop through the evening and into the overnight hours. The primary focus occurred along Highway 18 in the afternoon southwest and south of Sioux Falls, then along Interstate 90 during the evening, and settled again to along the Highway 18 corridor as the effective cold pool boundary collapsed southward through the night. The final 24
Source: NOAA National Weather Service Storm Events Database (event 1197815). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in McCook County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.