Honestly, what it looks like to me is steam/exhaust coming from the top of one of the downtown building’s heating systems. It was very cold in Nashville yesterday morning, and I’ve seen that exact thing going into downtown Nashville on cold winter mornings. I suspect it was programmed to activate at 6:30.
What I’m curious about is, I know one of the tv stations has cameras mounted on the Bat Building spires. I have yet to see any video from those cameras. Not sure if they keep them on 24/7.
Do they routinely spew a jet of steam hundreds of feet into the air?