Major Texas Flooding Threat Tonight: Hill Country at Highest Risk

A major, high-impact flooding threat is developing across the Texas Hill Country, Edwards Plateau, Central Texas, and South-Central Texas tonight into Wednesday. A Level 4 of 4 excessive-rainfall risk is now in place, with another round of very heavy to extreme rain expected overnight. Today’s Texas Weather Roundup is sponsored by HTeaO — Texas born & brewed. Real tea, real refresh. More than a foot of rain has already fallen in portions of Medina, Bandera, Uvalde, Edwards, and Real counties. Major rises have occurred on creeks, streams, and rivers near Uvalde, Hondo, and communities west of San Antonio. Additional rainfall tonight into Wednesday morning may produce: • Rainfall rates of 2–4 inches per hour • Localized totals exceeding 10 inches • Potentially extreme totals near 20 inches in isolated areas • Rapidly flooded roads and low-water crossings • Major rises on creeks, streams, and rivers • Washed-out or impassable roads • Frequent lightning and gusty winds The highest-concern corridor includes portions of: • Hill Country • Edwards Plateau • South-Central Texas • Central Texas • Eastern Big Bend • Western San Antonio metro Communities to watch include Uvalde, Hondo, Eagle Pass, Del Rio, Kerrville, Fredericksburg, Junction, Sanderson, Fort Stockton, Austin, San Antonio, Comfort, Boerne, Mason, Llano, Brady, and nearby areas. A mesoscale convective vortex, or MCV, will help draw a continuous supply of moisture inland from the Gulf. Storms may rotate around this circulation and remain over the same locations for hours. That creates the potential for a “rain bomb” tonight into Wednesday morning, with extreme rainfall accumulating over terrain that responds quickly to heavy rain. The Hill Country and Edwards Plateau are especially vulnerable because rocky and limestone terrain allows water to run rapidly into roads, creeks, streams, and river channels. This does not mean everyone inside the risk area will flood. Rainfall totals will vary considerably over short distances. However, locations hit repeatedly may experience serious or potentially catastrophic flooding. If your phone receives a Flash Flood Warning or Flash Flood Emergency, act immediately. Safety reminders: • Have Wireless Emergency Alerts enabled • Keep phones charged overnight • Follow local emergency management, fire, and law-enforcement agencies • Avoid unnecessary overnight travel • Never drive through water covering a road • Leave immediately if local officials tell you to evacuate • Stay away from creeks, streams, rivers, and low-water crossings Rain chances and flooding concerns continue Wednesday, Wednesday night, and into Thursday across parts of Central and West Texas before gradually decreasing toward the weekend. Track storms: TexasStormChasers.com/radar Local forecasts, interactive radar, alerts, and frequent video updates are available in the free Texas Storm Chasers mobile app. You can also monitor the 24/7 Texas weather radar stream on YouTube. Chapters: 0:00 Major Texas flooding threat tonight 0:28 HTeaO sponsor and Tuesday lunchtime update 0:58 Rain totals and flooding already underway 2:08 Current radar and MCV development 3:29 Level 4 flood risk tonight into Wednesday 5:12 Extreme overnight rainfall setup 7:26 Forecast totals and potential 20-inch maximums 8:36 Why Hill Country flooding can become serious quickly 9:01 River, creek and overnight safety concerns 9:54 How the MCV pattern evolves through Wednesday 10:27 Flood risk continues into Thursday 10:45 Warning readiness and travel guidance 11:56 Radar, app and frequent update plans #TexasWeather #TexasFlooding #TexasStormChasers