San Antonio woke up Wednesday, April 29, to sticky, muggy air and temperatures already hovering around 79°F before sunrise. Humidity is thick, the air is soupy, and scattered showers and thunderstorms are expected to bubble up after about 10 a.m. Highs should reach near 89°F ahead of a front that will nudge cooler air into the area. Light east winds early will shift as the boundary moves through, and brief heavy downpours could slow afternoon traffic, so it is a good day to keep the umbrella within reach.
Storm Timing
A cold front dropping south is expected to fire up storms from mid-morning into the afternoon and evening, with the main risk window starting after 10 a.m. Wednesday (April 29). A few storms could briefly turn strong to severe in isolated pockets. Forecasters point to Thursday night (April 30) for the heaviest and most widespread rain potential, with locally heavy totals on the table. For updated timing and any watches or warnings as the system organizes, check NWS Austin/San Antonio.
What To Expect
Temperatures should top out near 89°F today, then slip back into the mid 80s behind any afternoon storms before dropping into the upper 60s tonight. Thursday stays unsettled with more shots at rain and the greatest threat for heavier totals late Thursday into early Friday. By Friday, it will feel cooler but also gusty, with north-northeast winds around 10 to 15 mph and gusts near 30 mph. The payoff comes this weekend when drier, more comfortable air settles in and highs land in the low 70s.
Commute And Outdoor Plans
Pockets of heavy rain could lead to slick roads and brief drops in visibility during stronger storms, so plan on extra time for afternoon errands and commutes. If you have outdoor events scheduled from Thursday night into Friday morning, it is worth considering a backup indoor option and securing tents or loose gear ahead of the gusty winds. This post updates our recent coverage of the heat, so see how San Antonio turned into a steamy sauna for background on the recent warm spell.
Bottom line: it starts off hot and muggy this morning, with storms likely after mid-morning and the best chance for heavy rain Thursday night (April 30). Keep an eye on local forecasts, stay cautious around standing water on roadways, and expect updates if watches or warnings are issued.
