Mar 19, 2012
A deep upper level trough of low pressure and strong cold front moved into an area of deep boundary layer moisture. The system initially produced supercell thunderstorms which produced several tornadoes and large hail. There storms then transitioned into a quasi-linear convective system that produced heavy rainfall and flooding.
Source: NOAA National Weather Service Storm Events Database (event 367685). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Gillespie County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.