Stormy Sunday Ahead for San Antonio Area

Severe thunderstorms possible with hail, damaging winds, and heavy rain

Apr. 12, 2026 at 12:11pm

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A dramatic landscape painting in the style of Caspar David Friedrich, with a small town or rural setting dwarfed by a vast, stormy sky filled with heavy, swirling clouds and ominous shafts of light, conveying the sublime power of the impending weather.The looming storm clouds over San Antonio foreshadow the potential for severe weather, underscoring the region's vulnerability to the overwhelming forces of nature.San Antonio Today

The San Antonio area is bracing for a stormy Sunday, with a 40% chance of severe thunderstorms throughout the day. The storms could bring hail, damaging winds, and heavy rainfall that could lead to localized flash flooding. While the severe threat is expected to gradually decrease as the storms move east, the region will remain warm and humid with additional storm chances continuing into early next week.

Why it matters

Severe weather can pose a significant threat to public safety, causing property damage, power outages, and dangerous driving conditions. The potential for heavy rainfall also raises concerns about flash flooding, which can be life-threatening. Residents in the San Antonio area need to stay weather-aware and prepared for the possibility of severe storms on Sunday.

The details

According to the forecast, a line of storms is expected to push through the San Antonio area on Sunday morning, bringing the highest chances of severe weather. The storms could produce hail, damaging winds, and heavy downpours that could lead to localized flash flooding. As the storms move east, the severe threat is expected to gradually decrease, but additional storm chances will continue throughout the afternoon and evening, especially if cloud cover thins enough to allow for additional heating and storm redevelopment.

  • A Severe Thunderstorm Watch remains in effect until 8 AM Sunday.
  • Storms are expected to move across the I-35 Corridor Sunday morning, bringing a 40-50% chance of rain.
  • Additional storms are possible Sunday afternoon if clouds thin, with a 40% chance of storms.
  • The severe threat, including the potential for hail, damaging winds, and heavy rain, will be highest during the morning hours.

The players

KSAT-12

The local San Antonio television station that provided the weather forecast and reporting for this story.

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What’s next

Residents in the San Antonio area should continue to monitor the weather forecast and be prepared to take shelter if severe storms develop. The local authorities and emergency management agencies will be closely tracking the storm system and providing updates throughout the day.

The takeaway

This storm system highlights the importance of being prepared for severe weather in the San Antonio region. Residents should stay informed, heed any warnings or watches issued, and be ready to take appropriate safety precautions if dangerous storms materialize on Sunday.