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9h ago

Gulf Disturbance Raises Weekend Rain Chances for San Antonio

Isolated tropical downpours could drop 2+ inches in spots, creating pockets of flash flooding that would affect local water management and outdoor plans.

Shown are the expected heat index values, or humidity-driven “feels like” temperatures, across South Texas at 5 p.m. Thursday.
A weak atmospheric disturbance has formed in the western Gulf of Mexico. This system will continue north and bring scattered showers and storms into South Texas on Friday and into the weekend.
Weather satellite imagery taken at 2:30 p.m. Thursday shows a disturbance in the western Gulf of Mexico as it starts to approach the Texas coastline, upper left.
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Overview

  • A weak swirl of energy in the southwest Gulf is moving north and is expected to boost scattered tropical showers and storms from late Friday into Saturday.
  • Citywide rain probabilities are modest, with forecasts around 20%–30% on Friday and about 30%–40% on Saturday, meaning many neighborhoods may stay dry while others see heavy rain.
  • Storms that form could produce frequent lightning, gusty winds, and very heavy rates that may exceed 2 inches per hour, creating localized flash-flood threats in the heaviest downpours.
  • San Antonio enters the weekend after a very wet spring followed by a brief dry spell; drought has eased in parts of Bexar County but San Antonio Water System customers remain under Stage 3 watering limits.
  • Forecasters say scattered chances will linger into early next week and residents should watch for follow-up showers that could raise flood risk Monday–Tuesday and for a possible Saharan dust plume that may suppress rain later in the week.