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4w ago

Heavy Rainfall and Flash Flood Threat Intensify Across Southeast Texas

Southeast Texas faces significant flooding risks as training thunderstorms and high rainfall rates continue through Thursday morning, with urban areas like Houston and San Antonio particularly affected.

The regional National Weather Service office for Houston and Galveston is placing several coastal counties south of Houston under a flood watch this week.
These two models show two very different weather scenarios Thursday morning across Texas. The High-Resolution Rapid Refresh model, left, depicts heavy rainfall across the lower and middle Texas Gulf Coast. The North American Mesoscale model, right, suggests heavier downpours will be west of Houston.
Heavy rain with totals in the double digits will ramp up flood risks in Texas.
This map shows rainfall estimates between Wednesday morning and Thursday morning, according to the National Oceanic and Atmospheric Administration. The highest rainfall totals through Thursday morning have been between Corpus Christi and San Antonio, where 4 to 6 inches have fallen.

Overview

  • Heavy rainfall and thunderstorms are ongoing across Southeast Texas, with up to 3-4 inches of rain expected in Houston and isolated areas south of the city potentially receiving over 6 inches.
  • San Antonio is experiencing scattered thunderstorms, with up to 2.5 inches of rain forecast and urban street flooding posing challenges during morning and afternoon commutes.
  • Flood watches remain in effect for multiple counties, including Wharton, Jackson, Matagorda, and Brazoria, as flash flooding risks escalate due to training thunderstorms and high rainfall rates.
  • Dry soils, resulting from recent drought conditions, are exacerbating flooding risks by limiting the ground’s ability to absorb water quickly.
  • Localized severe weather, including hail and damaging winds, remains a possibility, though the primary concern is widespread flooding, particularly along the Texas Gulf Coast and south of Houston.