TX Austin/San Antonio TX Zone Forecast for Friday, August 18, 2017 _____ 121 FPUS54 KEWX 190819 ZFPEWX Zone Forecast Product for South Central Texas National Weather Service Austin/San Antonio TX 319 AM CDT Sat Aug 19 2017 TXZ192-192130- Travis- Including the city of Austin 319 AM CDT Sat Aug 19 2017 .TODAY...Mostly sunny. Highs in the upper 90s. South winds 5 to 10 mph.