What may have been a tornado destroyed several buildings in Rowan County this evening, although no one was hurt.The weather struck at about 6:30 p.m. in the 300 block of Mountain View Road, as a line of thunderstorms moved from northern Iredell County into central Rowan, said Rowan Emergency Management Director Frank Thomason.Strong winds blew a tree onto a carport, then downed numerous trees and destroyed a barn and several outbuildings on nearby Goodnight Road, Thomason said. It finally caused the collapse of two buildings at a supply business on North Main Street just north of China Grove, he said.National Weather Service meteorologists will be on site tomorrow morning to survey the damage and determine whether the winds came from a tornado or microburst from a thunderstorm.