Thunderstorms and Wind Gusts Impact San Antonio I-35 Corridor

Wet and unsettled weather expected through early next week in Texas city.

Apr. 18, 2026 at 8:22am

Got story updates? Submit your updates here. ›

A vast, atmospheric landscape painting depicting a dramatic, cloud-filled sky looming over the distant cityscape of San Antonio, Texas, conveying the overwhelming scale and energy of an approaching storm system.The approaching thunderstorms over San Antonio's I-35 corridor evoke the raw power and sublime beauty of the region's volatile weather patterns.San Antonio Today

Thick clouds are building over San Antonio, Texas, as scattered thunderstorms begin to pulse across the region, setting up a wet and unsettled stretch into early next week. Showers and storms will increase through the day, with peak activity expected after early afternoon, bringing rain chances up to 50% and wind gusts reaching 30-35 mph in stronger cells.

Why it matters

The severe weather is expected to impact travel conditions along major highways like I-35, Loop 410, and Highway 281 in San Antonio, with slick pavement, sudden slowdowns, and localized ponding possible. Meteorologists are tracking multiple rounds of storms, with lightning intensifying quickly in isolated stronger cells.

The details

According to the National Weather Service, drivers should prepare for the wet and windy conditions, keeping headlights on and avoiding rapid lane changes during rain bursts. The unsettled weather pattern is expected to continue into the evening, with showers likely continuing and rainfall totals adding up in waves. Sunday will bring a brief break, but clouds will linger with only a slight rain chance. By Monday, storm chances ramp up again, with a 60% likelihood of showers and thunderstorms impacting the commute and outdoor plans into Tuesday, when rain chances remain near 50%.

  • Showers and thunderstorms will increase through the day, with peak activity expected after early afternoon.
  • Rain chances climb to 50%, with wind gusts reaching up to 30 to 35 mph in stronger storms.
  • Conditions remain active into the evening, with showers likely continuing and rainfall totals adding up in waves.
  • Sunday brings a brief break, but clouds linger with only a slight rain chance.
  • By Monday, storm chances ramp up again, with a 60% likelihood of showers and thunderstorms.

The players

National Weather Service

The federal agency that provides weather forecasts and warnings for the United States.

Got photos? Submit your photos here. ›

What they’re saying

“Drivers along I-35, Loop 410, and Highway 281 should prepare for slick pavement and sudden slowdowns.”

— National Weather Service

What’s next

Meteorologists are tracking the storm system and will continue to provide updates on the potential impacts throughout the weekend and into early next week.

The takeaway

The severe weather in San Antonio is a reminder for residents to stay vigilant, monitor local forecasts, and take necessary precautions when traveling during heavy rain and thunderstorm conditions.