San Antonio is starting Thursday under a real storm threat — showers and thunderstorms are likely before 1 PM CT, with a high near 84°F and mostly cloudy skies through the afternoon. If you’ve got outdoor plans this morning, pack a compact travel umbrella before you walk out the door.
Today’s Setup
National Weather Service forecasters say the most favored areas for storm development are the Hill Country and southern Edwards Plateau, with activity potentially pushing into the I-35 corridor. This is a low-confidence setup: many San Antonians will stay completely dry, but storms that do fire will have deep moisture to work with — meaning any cell can drop heavy rain fast. Localized flooding is possible, especially in low-lying areas near the River Walk and drainage creeks. Remember: this is Flash Flood Alley. Turn around, don’t drown.
Best Window To Be Outside
After 1 PM CT, storm chances drop significantly. Late afternoon is your safest bet for errands, a walk at the Pearl District, or outdoor exercise. Tonight carries a lingering 25–30% storm chance before 10 PM CT, tapering off after midnight. Keep a packable rain jacket in the car — you’ll thank yourself at least once today.
Flood and Storm Risk
The Weather Prediction Center flagged a Slight Risk for excessive rainfall over parts of the Southern Plains today. The bull’s-eye sits north of San Antonio, but the same moisture loading that system is sitting right over South Texas. Any storm that forms can produce quick, heavy downpours. Stay off flooded roads and watch creek levels closely.
Triumph at Frost Bank Center — Tonight
Heading to the Triumph: Rock & Roll Machine Reloaded Tour at Frost Bank Center tonight? Good news — it’s indoors, so the storms won’t touch you. Just plan for wet parking lots and leave a few minutes early. If you still need seats, Get tickets on SeatGeek before tonight’s show.
Spurs Playoff Weather This Weekend
The San Antonio Spurs host the Oklahoma City Thunder in West Conference Finals Game 3 at Frost Bank Center on Friday, May 22. By game time, Friday’s forecast is mostly sunny and near 87°F — outstanding tailgating conditions once this morning’s storm window clears. Represent in a San Antonio Spurs jersey or San Antonio Spurs hoodie and make some noise at the Frost Bank Center. Need seats for Friday or Saturday’s Game 4 on May 23? Find tickets on StubHub before they’re gone.
Rainy Day Comfort Food
A stormy Thursday is made for something slow and hearty. Load up a programmable slow cooker with chili or beef stew before you leave for work and come home to dinner already done. Prefer stovetop? An enameled cast iron Dutch oven is perfect for a thick pot of soup on a cool, rainy evening. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Friday clears out nicely — high near 87°F, mostly sunny after an early storm chance fades before 7 AM CT. The weekend looks warmer and more settled, perfect for Spurs playoff energy around the Frost Bank Center. That said, the National Weather Service warns of an active, unsettled pattern continuing into next week with multiple rounds of storms and renewed flooding potential. Keep checking the San Antonio weather forecast so nothing catches you off guard.
