Prolonged flood event affecting San Antonio and south-central Texas (Apr 13–May 3, 2026) driven by stationary front and Gulf moisture surge. River discharge exceeds bankfull; evacuations underway.
🌊 OPEN LIVE 3D WEATHER ALERTSA prolonged flood event is affecting the south-central United States beginning April 13, 2026, with the epicenter near San Antonio, Texas (29.425°N, 98.495°W). The flooding is expected to persist through May 3, 2026, posing significant risks to communities across multiple watersheds in the region. Heavy rainfall over saturated soils and elevated river levels are driving widespread inundation, with the greatest hazard to low-lying areas, evacuation zones, and critical infrastructure along drainage corridors.
This flood event is driven by a stationary weather pattern that has locked moisture-rich air masses over south-central Texas for an extended period. The warm, moist flow from the Gulf of Mexico collides with a quasi-stationary frontal boundary, generating repeated rounds of thunderstorms and continuous rainfall over the same drainage basins. Hydrologically, the Guadalupe River and surrounding tributaries are responding to cumulative precipitation by exceeding bankfull discharge; soil infiltration capacity has been exceeded, forcing water rapidly downslope into urban and agricultural areas.
Pandita Data integrates NOAA rainfall radar, USGS stream gauge telemetry, and satellite-derived soil moisture to model flood propagation in real time. Cumulative rainfall maps reveal the spatial distribution of precipitation, while stream discharge data pinpoint where rivers exceed flood stage. The 3D flood simulation visualizes water depth and flow velocity across affected terrain, enabling emergency managers to identify high-risk corridors and optimize evacuation routes.
Flash floods in south-central Texas can occur within minutes of heavy rainfall due to steep terrain and impervious urban surfaces. River flooding develops over hours to days as runoff accumulates downstream. The most dangerous floodwaters move at 10+ mph and can sweep vehicles off roads; a mere 12 inches of flowing water is sufficient to displace a car.
Monitor live flood conditions and stream discharge data on Pandita Data's 3D flood simulation. Real-time radar and USGS gauges update continuously, helping you assess risk to your location and make informed evacuation decisions.