Update, 3 p.m.: Just after 3 p.m. Monday, March 21, the San Antonio and Austin National Weather Service office updated the evening forecast and included all of San Antonio in a tornado watch encompassing several cities in Texas. The watch is due to expire at 10 p.m. Threats include tornadoes, hail and wind gusts up to 75 mph. All are “likely” in the affected areas. Tornado monitoring affects nearly 14 million residents.