San Antonio rolled into Thursday under a thick, muggy blanket of clouds, waking up to about 73°F and air you could practically chew. The afternoon will heat up toward 87°F, and while many neighborhoods will stay mostly dry between downpours, spotty showers are likely to pop up. A compact umbrella in the bag would not be the worst idea, since storms will be very hit or miss.
Afternoon Storm Chances
With plenty of heat and low-level moisture in place, the atmosphere is primed for isolated to scattered showers and a few thunderstorms during the peak afternoon hours. Forecasters are pegging the odds around 20–25% this afternoon. Any storm that does fire could bring brief heavy rain and gusty winds, which may cut visibility and slow the commute. Light easterly breezes around 0–5 mph will otherwise keep things fairly calm. According to the NWS Austin/San Antonio, the best chance for showers lines up with the warmest part of the day.
Late Thursday Into Friday
The main show is expected late Thursday night into early Friday, when heavier, slower moving storms could flare up, especially across the Rio Grande plains and the southern Edwards Plateau. In those areas, locally heavy totals may lead to brief flash flooding in low-lying spots. On Friday, the axis of heavier rain may wobble east toward the city, which would increase how widespread showers and thunderstorms become through the day.
If you live in a flood-prone area, it is a good time to move important items off the floor and steer clear of driving through standing water. We previewed this setup in an earlier update; read our June 3 storm preview and check local advisories at the City of San Antonio.
Commute And Weekend Outlook
Tonight’s low should land near 73°F, with east-southeast winds nudging up to about 5–10 mph. Friday night carries higher odds for rain and the greatest chance for slow, water-logged streets.
Looking toward the weekend, the humidity sticks around. Saturday brings more scattered afternoon storms, while Sunday trends drier as highs climb back into the upper 80s and some spots see gusts near 20 mph. If you are heading out, give yourself extra time when radar shows storms nearby and never try to drive through standing water, no matter how shallow it looks.
