Jul 16, 2021
A series of slow-moving lines and clusters of thunderstorms moved east-southeast across southern Illinois from the midday hours through the early evening hours. The storms produced flooding rains and isolated strong wind gusts. The storms intensified during peak afternoon heating within a region of unstable southwest flow ahead of a mid-level disturbance. The disturbance rotated eastward near St. Louis, Missouri just ahead of a cold front. The soil across southern Illinois was saturated from an
Source: NOAA National Weather Service Storm Events Database (event 968181). 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.