SUNDAY: Flooding risk high east of San Antonio, but strong storms are still possible for the Alamo City

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FORECAST HIGHLIGHTS

Sunday has started damp, and as the day goes on, there is a chance for storms. While not for everyone, there is a growing concern for flooding, especially east of San Antonio. Here’s what you need to know:

• THIS AFTERNOON IN SAN ANTONIO: Additional storms possible, but again — not guaranteed for everyone (40% to 60%).

  • WATCHING FOR: Hail, gusty winds

  • RAINFALL: Most, less than 0.25″. Some, more than 1″

• THIS AFTERNOON EAST OF SAN ANTONIO: Flooding concern.

Highest risk for flooding today is east of San Antonio, along the Guadalupe and Colorado Rivers (Copyright 2026 by KSAT – All rights reserved.)

FORECAST

SAN ANTONIO

Today’s Forecast (Copyright 2026 by KSAT – All rights reserved.)

We’ll maintain a 40% to 60% chance for storms through the afternoon and evening, especially if clouds break enough for additional heating. Any storms that redevelop could again produce hail, damaging winds, and heavy rainfall. BUT AGAIN, NOT A GUARANTEE FOR STORMS IN YOUR BACKYARD. Rather, you should stay weather aware if you have any Sunday afternoon plans outdoors.

EAST OF SAN ANTONIO

Sunday’s Potential Rainfall will feature a WIDE RANGE. Wherever the 4+” bullseyes set up, flooding will be possible. (Copyright 2026 by KSAT – All rights reserved.)

Take a look at the wide range of rainfall potential for areas east of San Antonio! Somewhere near the Guadalupe or Colorado Rivers, and along I-35 and I-10 there could be pockets of flooding rains Sunday afternoon and evening.

If you find yourself in a FLASH FLOOD WARNING and come across rushing water over roadways, please remember: TURN AROUND, DON’T DROWN.

NEXT WEEK

Much less active next week, but we do have a chance for a storm or two Wednesday. Then, quiet and near 90° as Fiesta begins. For the first weekend of Fiesta, we’ll have a small chance for rain Saturday as a cold front moves through, making for a cooler, pleasant Sunday.

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