FloodZoneMap.org

Flash Flood — Wilson, TX

Aug 20, 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 655995). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Wilson, TX

This event is one of many recorded floods in Wilson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

View Wilson County flood data →

More Flood Stories

Flood$50.0M damage

Wilson, TX · Oct 17, 1998

Flooding along the San Antonio River, Cibolo Creek and Geronimo CreekIn Bexar County, the San Antonio River begins just below Olmos Dam where it merges with spring flow.

Read the full account →
Flash Flood$35.0M damage

Wilson, TX · Oct 18, 1998

The Great October FloodIn advance of a very slow-moving upper level trough of low pressure over West Texas, a cold front drifted slowly southeastward into West Central Texas during the evening of Friday, October 16th.

Read the full account →
Flash Flood$80K damage

Wilson, TX · Sep 8, 2002

By late afternoon, rainfall was widespread across South Central Texas, having spread westward to the Rio Grande. A band of heavy rain stretching from near San Antonio through Floresville to Karnes City produced an additional round of flash flooding from late afternoon into the…

Read the full account →
Flash Flood$150K damage

Wilson, TX · Sep 5, 2001

Widespread showers and thunderstorms over the three counties produced general rainfall of 1 to 2 inches, with isolated totals of up to 6 inches between Seguin, Stockdale and Floresville. Numerous rural roads and low water crossings were closed.

Read the full account →