((HT: MyFoxPhoenix/Fox 10-KSAZ))
Authorities say the roof of the Arizona Cardinals' stadium in Glendale was slightly damaged by a thunderstorm that packed high winds.
Video below shot from TV news helicopters shows a couple of tears in one section of the fabric that stretches across the roof and the steel girders that make up the roof itself.
University of Phoenix Stadium spokesman Scott Norton says it's possible that wind gusts got under the metal skin of the structure, flipping a piece of it up and onto the roof and causing the fabric puncture.
Norton says stadium officials are evaluating the extent of the damage and how much it will cost to repair it. His gut feeling is that a microburst came through Glendale and created the damage seen below.
The Cardinals have their preseason opener at home August 14 against the Houston Texans.
Fox10 caught up with Norton, who was in the building at the time the storm came through...