May 21, 2019
An extensive line of thunderstorms moved east-northeast in a region of strong wind shear and weak to moderate instability. The storms occurred south of a warm front that extended from the St. Louis area eastward. Enhanced wind shear near the warm frontal zone resulted in locally increased storm intensity. Along the most intense portions of the line near bow echoes, some rotation was observed.
Source: NOAA National Weather Service Storm Events Database (event 819907). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Franklin County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.