San Antonio faces a serious storm day this Monday, with heavy showers and thunderstorms likely through the afternoon, a high near 84°F, and a Flood Watch in effect through Tuesday evening — today is not the day for the River Walk or Hill Country back roads.
Today’s Setup
The National Weather Service is running a Flood Watch for the San Antonio area through Tuesday evening, and the Weather Prediction Center has flagged South Texas at Moderate Risk for excessive rainfall today. The driver is surging tropical moisture from the remnants of former east Pacific Tropical Storm Cristina, pushing atmospheric moisture levels close to record territory. The NWS warns that any storm that fires up can produce 2 to 3 inches of rain per hour, and areas hit by repeated rounds could see up to 8 inches through Tuesday. Soils across the region are already saturated from recent weeks, making flash flooding the primary danger from Brackenridge Park to the Hill Country roads winding northwest toward Boerne and Helotes.
Best Window To Be Outside
Rain chances hold at 80% through the day, with storms most likely before 1 PM CT and continuing into the evening hours. Tonight still carries a 50% chance through midnight. If you need any outdoor time at all, aim for before 8 AM — then plan to stay in. Mowing, golfing, and River Walk strolls should be scrapped entirely today.
Flash Flood Risk
The NWS message is direct: turn around, don’t drown. Low-water crossings near Boerne, Helotes, and throughout the Hill Country can go from dry to dangerous in minutes. Monitor your phone for flash flood warnings and never attempt to cross a flooded roadway, even a familiar one. If storms knock out power at your home, a DARAN 288Wh Power Station — just $90 for Prime members this week — can keep phones, fans, and lights running through an outage.
What To Wear or Bring
Today is full rain-gear territory. A packable rain jacket belongs in your bag all day — storms can pop up with little warning. Toss in a compact travel umbrella for quick errands, and swap out sandals for waterproof hiking boots if you’ll be anywhere near muddy terrain or drainage areas.
Events This Week
The Don Toliver: Octane Tour hits Frost Bank Center tonight — and since it’s indoors, the storms won’t touch it. Arrive in a Don Toliver t-shirt and you’re set. Still need a seat? Find tickets on StubHub or Get tickets on SeatGeek.
Looking ahead to Friday, June 19: the San Antonio Spurs host the New York Knicks in a potential NBA Finals Game 7 at Frost Bank Center. No weather worries for that one — it’s an indoor arena — but the energy in the Alamo City is going to be electric. Gear up with Official team gear on Fanatics and bring the noise.
Dinner Tonight
A slow, stormy Monday is made for the slow cooker. Load a programmable slow cooker with beef chili or stew in the morning and let it do its thing all day. Prefer stovetop? An enameled cast iron Dutch oven handles a big pot of soup beautifully. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Tuesday stays unsettled — still a 50% storm chance with a high near 85°F and the Flood Watch running through Tuesday evening. The NWS is monitoring a tropical disturbance over Mexico that could sustain rain chances into midweek, followed by warmer and more humid conditions building late in the week. Stay current with the San Antonio weather forecast as the pattern evolves.
