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Severe Thunderstorm Warning Issued for Bexar, Texas

September 12, 2026 · wweather1 editorial · 1 min read

The National Weather Service has issued a Severe Thunderstorm Warning for Bexar, TX, active until 11:15 PM CDT on September 11. The storm carries hazards of 60 mph wind gusts, quarter-size hail, and potential flash flooding.

The National Weather Service office in Austin/San Antonio TX issued the warning at 10:26 PM CDT on September 11. At 10:25 PM CDT, radar detected a severe thunderstorm positioned near China Grove, approximately 7 miles northeast of Stinson Municipal Airport, traveling southwest at 15 mph.

The storm presents hazards of 60 mph wind gusts and quarter-size hail. Expected impacts include hail damage to vehicles along with wind damage affecting roofs, siding, and trees. Torrential rainfall accompanying the thunderstorm may lead to flash flooding.

Specific locations impacted by the warning include San Antonio, Stinson Municipal Airport, Kirby, St. Hedwig, Elmendorf, China Grove, Lackland AFB, Calaveras Lake, Sandy Oaks, Buena Vista, Martinez, Mitchell Lake, Losoya, Parita, Southton, Sayers, Brooks City Base, Adkins, and Braunig Lake.

Why it is dangerous and what to do

⚠️ Safety
• Move to an interior room on the lowest floor of a building for protection.
• Do not drive your vehicle through flooded roadways.
📊 The numbers, from wweather1 data
San Antonio: now +28°, Clear.
That is 6° above the September climate norm.
The record for this date is +38° (2011).
Three-day forecast: 12 September: +38°/+26° · 13 September: +38°/+25° · 14 September: +38°/+25°
The figures are computed automatically from the Open-Meteo/ERA5 archive — no eyeball estimates.

🌍 Weather in nearby cities

📰 Data source: NWS. Forecast and analysis — wweather1, based on Open-Meteo / met.no data.

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