Monday, May 26, is shaping up to be stormy and potentially dangerous across the San Antonio area, putting a damper on Memorial Day celebrations. According to the National Weather Service (NWS), the region faces threats of severe thunderstorms, large hail, damaging winds, and even isolated tornadoes.
Severe weather threat beginning Monday afternoon
Starting Monday afternoon, the chance for strong to severe storms will rise notably. The severe weather risk level is marked at 2 out of 5 for portions of the I-35 corridor, the Hill Country, and the Edwards Plateau, shifting southward into the southern Edwards Plateau from Tuesday afternoon through Tuesday night.
During the day, there’s a 30% chance of showers between 1 p.m. and 4 p.m., with thunderstorm chances increasing after 4 p.m. Wind gusts could reach 25 mph, and the heat index might climb as high as 103°F (39.4°C). Overnight into Tuesday, storm chances rise to 40%, with increasing cloud cover and lows around 75°F (24°C). Winds will be from the southeast at 10 to 15 mph, with gusts up to 20 mph.
Unsettled week with flood potential
Storm activity won’t stop after Memorial Day. The NWS is forecasting an active weather pattern with locally heavy rainfall and a continued flood risk throughout the South-Central Texas region. Rainfall totals between 1 and 3 inches (25–75 mm) are expected through Thursday, with locally higher amounts possible. A Level 1 of 4 excessive rainfall risk remains in place daily from Monday through Thursday.
While high temperatures may drop slightly, some areas in Southwest Texas could still push into triple digits, nearing or surpassing 100°F (37.8°C).
Rain chances continue into June
Don’t expect a quick return to sunshine. Scattered rain chances are forecast to hover between 30% and 50% through the end of the week and into Sunday, June 1. Conditions will remain humid, warm, and volatile—a classic late-spring setup in this part of Texas.
Pack those ponchos, because this Memorial Day week in San Antonio looks to be a mix of thunderstorms, heat, and heavy rain, with Mother Nature determined to make her presence felt.
