Oct 31, 2013
Prolonged flow from the Gulf of Mexico produced a deep moist layer at the surface with precipitable water values two standard deviations above the mean on area soundings. An upper level trough of low pressure moved out of northern New Mexico and across the Texas Panhandle providing lift to produce showers and thunderstorms. A surface trough was the focus of training storms which produced heavy rainfall that led to major flooding across the Onion Creek and Blanco/San Marcos River watersheds.
Source: NOAA National Weather Service Storm Events Database (event 481043). 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.