San Antonio, Texas – Scorching heat and a rising storm threat could interrupt weekend plans across Bexar County as temperatures soar Saturday. The National Weather Service expects a 102° heat index in San Antonio with isolated thunderstorms possible after 1 p.m., prompting a summer weather alert for the region.
According to the NWS Austin/San Antonio office, Saturday’s highs near 94°F will be accompanied by southeast winds up to 15 mph, with gusts as high as 20 mph. The chance of showers and thunderstorms begins in the early afternoon, especially near I-35 and U.S. 90. Motorists should use caution on roads like Loop 410, as strong gusts and brief downpours could reduce visibility.
Storm chances persist into Sunday, with a 30% probability of afternoon thunderstorms and a high near 95°F. Southeast winds will remain steady, contributing to ongoing heat stress. Residents should limit outdoor activities, wear light clothing, and stay hydrated. No widespread flooding is expected, but isolated lightning and gusts are possible.
By Monday, drier air returns with highs pushing 96°F and mostly sunny skies. The trend continues through Tuesday with highs near 97°F and minimal storm risk, but persistent heat could strain power demand.
⚠️ Five-Day Forecast for San Antonio:
- Saturday (July 12): High 94°F | Slight chance of storms after 1 p.m. | Heat Index up to 102°
- Sunday (July 13): High 95°F | 30% chance of storms | Winds SE 5–10 mph
- Monday (July 14): High 96°F | Mostly sunny | Breezy
- Tuesday (July 15): High 97°F | Partly sunny | Hot and dry
- Wednesday (July 16): High 97°F | Mostly sunny | Continued heat
