May 17, 2019
A warm frontal boundary across Nebraska worked slowly northward into southeast South Dakota by the evening of May 17 in advance of low pressure which strengthened over the western High Plains. A volatile air mass with around 2500 J/kg of elevated instability was in place, with deep layer shear as much as 50-60 knots. As a result, numerous thunderstorms developed across southeast South Dakota during the early evening. One cell strengthened and briefly became severe producing large hail and dama
Source: NOAA National Weather Service Storm Events Database (event 831441). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Brookings County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.