At least 13 tornadoes tore through Alabama Saturday night, and that number could go up as meteorologists with the National Weather Service continue their storm damage surveys.

Winds of up to 120 miles per hour wreaked destruction across the county as a huge weather system battered swathes of the U.S.

A gymnasium in Winterboro, Ala., was destroyed after a tornado sent a bus flying into the roof on Saturday, March 15.

A new tornado watch was issued Sunday for parts of West Virginia, Ohio and PA. Millions of Americans across the country are on alert for a severe weather outbreak as violent, long-track tornadoes with damaging winds of up to 80 mph and large hail are expected across the Midwest and South with the cross-country storm moving east.