FloodZoneMap.org

Flash Flood — Williamson, TX

Jul 1, 2001

Thunderstorms moving repeatedly over the eastern part of Williamson county produced a general rainfall of 2 to 3 inches, with as much as 5 inches reported from near Taylor northeastward to the Milam County line. Flash flooding closed numerous county roads through the remainder of the morning.

Source: NOAA National Weather Service Storm Events Database (event 5253688). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Williamson, TX

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

View Williamson County flood data →

More Flood Stories

Flash Flood2 deaths$500K damage

Williamson, TX · Nov 15, 2001

Rainfall began near sunrise over Williamson County, with totals in the mid-morning period approaching 3 inches. By the end of the afternoon, amounts were generally 4 to 6 inches over the south portion of the county, with a major part of the rainfall occurring over the drainage…

Read the full account →
Flash Flood1 death

Williamson, TX · Sep 8, 2010

Tropical storm Hermine made landfall near the Texas/Mexico border on the night of September 6. The storm moved northward through South Texas into South Central Texas. Strong winds and flooding rain began in South Central Texas on September 7.

Read the full account →
Flash Flood$25.0M damage

Williamson, TX · Jul 5, 2025

Precipitable water values over South-Central Texas remained near record levels, and a mid-level anticyclonic circulation continued over Central Texas providing lift to generate thunderstorms.

Read the full account →
Flash Flood$1.1M damage

Williamson, TX · Oct 30, 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.

Read the full account →