San Antonio rolled into Friday under clear but swampy skies, with temperatures stuck in the mid 70s and the air already feeling thick. It is the calm before a steamy afternoon, with a high near 91°F on tap and heat index readings that could sneak past 100°F. Scattered showers and thunderstorms become more likely after about 1 p.m., and any storm that fires up could bring a quick burst of heavy rain and lightning. South southeast winds of 5 to 10 mph may gust up to 20 mph as the day wears on.
Afternoon Showers And Commute Impacts
According to the NWS Austin/San Antonio, there is about a 50% chance of showers and thunderstorms this afternoon, especially inland and along the I 35 corridor. Most spots will likely see light rainfall totals, but a few isolated storms could wring out heavier downpours. Gusty late day winds could turn umbrellas inside out and knock down visibility, so the evening drive may feel slower in pockets. Keep weather alerts turned on and give yourself a little extra time if you are heading out during the rush.
Weekend Outlook And Early Week Flood Risk
Rain chances hang around into Saturday and Sunday, with highs near 92°F and another round of heat index readings close to 100°F. Saturday’s probability of precipitation sits around 40 to 45%. Forecast models point to a surge of tropical moisture early next week that could fuel slow moving storms and localized downpours of 1 to 3 inches, with some neighborhoods potentially picking up more than 3 inches over several days. That ramp up comes on the heels of mid June flooding in the region, and you can revisit the June flood watch coverage from Hoodline for background.
What To Bring And How To Stay Safe
Plan on a light rain jacket or umbrella this afternoon, and be ready for a sudden shower or brief heavy burst of rain that can cause quick ponding in low spots and cut down visibility. Stay hydrated and ease up on strenuous outdoor work during the hottest part of the day as the heat index climbs toward 100°F. If you have weekend plans outside, line up a backup indoor option and double check the latest forecast before you head out.
