Aug 21, 2016
Convection formed over the northern Mexican mountains during the afternoon and evening of August 20 beneath an upper level trough over the southern plains. This convection eventually formed into a mesoscale convective system as a low level jet developed overnight. The MCS produced heavy rain as it moved into a tropical airmass over South Central Texas. The MCS dissipated, and then convection redeveloped as a cold front moved through the region on August 21 and produced more heavy rain.
Source: NOAA National Weather Service Storm Events Database (event 656002). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Comal County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.