Severe thunderstorm activity swept through the San Antonio region on Tuesday night, May 26, 2026, triggering a series of life-threatening weather alerts. While a tornado warning for the San Antonio metro area has been cancelled, the threat remains active for surrounding counties.
A new tornado warning has been issued for rural areas in Guadalupe County, specifically to the south and east of Seguin. This warning is scheduled to remain in effect until 11:00 p.m. Wednesday night.
Flash Flood Threats and Emergency Safety
In Bexar County, a flash flood warning is in effect for the majority of the area through 1:15 a.m. Wednesday. This follows reports that 1 to 2 inches of rain fell within a very short window, with up to an additional inch possible for northern Bexar County through midnight.
The National Weather Service warned that life-threatening flash flooding is possible across urban areas, highways, streets, underpasses, and various creeks and streams. Officials have advised that travel is not recommended.
“Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows,” the National Weather Service said in a statement. “If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris.”
Storm Intensity and Regional Risks
The progression of the storm system, driven by low atmospheric pressure, moved into the San Antonio metro area after 8 p.m. Tuesday. While the risk of large hail and damaging winds is relatively low for San Antonio—rated at a level 1 of 5—the threat is higher to the west.
Cities such as Kerrville, Bandera, Hondo, Uvalde, Junction, and Leakey are under a higher level 2 of 5 risk for severe thunderstorms capable of producing hail and damaging winds. A flood watch remains in place for the Hill Country and the I-35 corridor through early Wednesday morning.
Future Outlook
Weather models indicate that storm activity may continue in the area through midnight before winding down overnight. Because the storms are expected to move out of the area relatively quickly, the long-term flood threat to local rivers, creeks, and streams may be limited.
Residents should remain prepared for isolated rainfall totals of up to 5 inches in some parts of the watch area through Wednesday morning.
Frequently Asked Questions
Where is the current tornado warning located?
A tornado warning is currently in effect for rural parts of Guadalupe County, mainly south and east of Seguin, until 11:00 p.m. Wednesday night.
What is the primary flood risk for Bexar County?
A flash flood warning is in effect for the majority of the county until 1:15 a.m. Wednesday, with risks including life-threatening flooding in urban areas, highways, and underpasses.
How much rain could fall in the Hill Country and I-35 corridor?
Between 1 and 3 inches of rainfall is likely, though isolated totals could reach up to 5 inches.
How are these weather conditions impacting your local travel plans?
