Jul 21, 2022
A MCS over Tennessee during the morning hours of July 21 pushed an outflow boundary into north Alabama in the afternoon. The air mass was very unstable south of the outflow boundary with surface based CAPE 3500-4500 J/kg and DCAPE 1300-1500 J/kg. The storms that initiated in the afternoon organized into QLCS that produced widespread damaging winds, large hail, and flash flooding.
Source: NOAA National Weather Service Storm Events Database (event 1045665). 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.