San Antonio woke up sticky and foggy Sunday morning, with patchy mist and temperatures around 72°F. Expect a rapid warm-up today, with a high near 94°F likely, and the combination of heat and humidity pushing heat-index values near or just above 100°F.
Afternoon Storm Risk
There is a small, roughly 10–20% chance for isolated showers or thunderstorms later today, with the best window for anything that develops from about 4–8 p.m. CDT on Sunday, April 26. Most neighborhoods should stay dry, but forecasters caution that any storm that does pop could throw down large hail and damaging wind gusts. According to the NWS Austin/San Antonio, heat-index values may top 100°F today.
Beat The Heat
Humidity and high temperatures are expected to stick around into early next week, so it is a good day to take it easy during the hottest hours and build in extra water and shade breaks if you have to be outside. The City of San Antonio maintains an interactive map of cooling locations and heat-safety guidance, call 311 or see the City of San Antonio for details.
Looking Ahead
The NWS Austin/San Antonio indicates the heat will peak by Tuesday into Wednesday, with mid to upper 90s likely and isolated triple-digit readings possible away from the urban core. A cold front is expected to move through in the mid to late week period, bringing higher rain chances and cooler conditions, although the exact timing is still uncertain. Keep plans flexible for outdoor events later in the week and watch for short-term updates as the front approaches; if you have outdoor work scheduled, consider shifting it to the morning hours. According to the NWS, confidence on the front's exact timing remains low at this range.
For background, see our earlier coverage from April 24 for the original outlook and tips: earlier "sweat alert" outlook. This post updates timing and heat-index details for readers planning the coming week.
