Jul 19, 2018
A strong mid-level wave pushed southeast toward southwest Minnesota overnight and the early morning hours on July 19. A large cluster of storms developed across eastern South Dakota after midnight, and with a high moisture content to the air mass, rainfall rates were quite high. One storm on the southern edge of the complex intensified, with strong 0-3km shear with low-level jet contributing to a brief meso-vortex development as the storm moved into the southern side of Brookings, SD.
Source: NOAA National Weather Service Storm Events Database (event 773526). 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.