As a coast-to-coast winter storm slices across the U.S. Sunday and Monday, severe thunderstorms are expected to fire up across portions of the South on the warm side of the storm system.

Areas north of Houston and Harris County are under a tornado watch through 6 p.m. Sunday as a powerful cold front slices through Southeast Texas.

As severe weather remains possible for Southeast Texas, a tornado watch has been extended for three counties in the area. The National Weather Service Lake Charles has extended a tornado watch for Hardin,