May 24, 2020
An upper level shortwave trough moved through West Texas and interacted with a dryline to generate thunderstorms. The airmass was strongly unstable with only modest vertical wind shear and high precipitable water. Storms evolved into a line as they moved across South Central Texas producing large hail, damaging wind gusts, and one tornado. They also produced heavy rain that led to flash flooding.
Source: NOAA National Weather Service Storm Events Database (event 891274). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Bexar County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.