SAN ANTONIO (KTSA News) – A good-looking weekend lies ahead, but you might have to figure out a way to stay dry before it gets going. The National Weather Service says there is a 20% chance of thunderstorms after 7 p.m. on Friday for San Antonio, New Braunfels and part of the Hill Country. The chance of thunderstorms goes up to about 80% after midnight through 4 a.m. on Saturday.