We live in Mississippi and know too well about tornados. They scare the hell out of us since they are so unprediciable. We carry a weather radio in the camper and always ask at checkin where to go in case of severe weather. I don't even want to be in the truck or trailer when winds are gusting over 50 mph.
Another thing to watch is overhead limbs and nearby trees when you arrive to set up at a site. We have changed sites a few times when a large dead limb would be over the camper. I was motorcycle tent camping one time and had just packed up my tent when a very large branch camp down right where my tent was. After that experience, I am careful!