Parts of Southeast Texas northeast of Houston are under a tornado watch Friday until 7 p.m., the National Weather Service said. Doppler weather radar at 12:30 p.m. was showing a cluster of strong to severe thunderstorms moving north,

A tornado watch is in effect for Libery and Polk counties until 7 p.m. Any thunderstorms that develop could bring heavy rain, strong winds and the threat for a brief isolated tornado. Expect rain throughout the day on Friday with occasional thunderstorms and temperature highs in the mid 70s.