Jun 24, 2021
A line of strong thunderstorms and heavy rain moved through Iowa on the 24th, which led to flash flooding for some areas. The areas seeing the largest impact were in Jefferson and Van Buren Counties in Iowa. The environment in which these storms were in not only favored thunderstorms, but heavy rain, as moisture indices were near record level. Very efficient rain rates were seen, where 2 to 3 inches per hour were common.
Source: NOAA National Weather Service Storm Events Database (event 964108). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Jefferson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.