May 18, 2021
In the overnight hours on May 17th into the early morning on May 18th, a cluster of slow moving severe thunderstorms associated with a weak mid-level disturbance drifted east across southeastern Louisiana. Ample overnight instability and weak steering flow resulted in damaging wind gusts, flash flooding and a few isolated weak tornadoes.
Source: NOAA National Weather Service Storm Events Database (event 960554). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in St. Charles County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.