I dunno, I'm only a lowly mechanical designer working on my engineering degree very slowly but, the Superdome looks like a mushroom to me, I've seen mushrooms stick around through some pretty hefty storms a few small unrecorded twisters, while working on my grandparents farm during the summers.
To me, the only thing I would worry about is the vibrations. We had a bridge here in Philly shake violently and crack during a nice sunny afternoon due to the way a gust of wind cut through it's structure.
Told my husband what you said, and he told me to tell you to notice the difference between the structure of a mushroom and the design of the Superdome. The mushroom has a wide stem at the center "holding" it down.
The Superdome doesn't. I hate to see us "experiment" with this structural design with 20,000 people in it.