Texas Flash Flood Warning | Effective 04/20/2026 12:48

Headline: 
Flash Flood Warning issued April 20 at 2:48PM CDT until April 20 at 5:00PM CDT by NWS Austin/San Antonio TX
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
April 20, 2026 - 12:48pm
Expires: 
April 20, 2026 - 3:00pm
Description: 
At 248 PM CDT, Doppler radar and automated rain gauges indicated thunderstorms producing heavy rain across the warned area. Between 2 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar and automated gauges. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. Some locations that will experience flash flooding include... San Antonio, New Braunfels, Schertz, Cibolo, Converse, Universal City, Live Oak, Selma, Randolph AFB, San Antonio Int Airport, Kirby, Alamo Heights, Windcrest, Terrell Hills, Bulverde, Garden Ridge, Shavano Park, Hollywood Park, McQueeney and Olmos Park. A swift water rescue was reported at the intersection of Nacogdoches and Cattleman Street in NE Bexar County at 210pm.
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Stay away or be swept away. River banks and culverts can become unstable and unsafe.
Area Description: 
Bexar, TX; Comal, TX; Guadalupe, TX
Forcast Office: 
NWS Austin/San Antonio TX
Sender: 
w-nws.webmaster@noaa.gov