Robert Hall called a few moments ago and informed me of damage in northern Denton, especially in the northwestern corner of the city, where powerlines (perhaps high-tension lines) are down, large trees have been felled, and buildings have been damaged. He described the event as a possible tornado, and radar data indicates that may be so, as the storm had a small hook and velocity couplet at the time the damage occurred.

On a side note, I lived in northern Denton up until a year ago - very close to where the damage apparently occurred. More later once Rob relays more information.