Lived in the Tulsa area for nearly 2 years going to school there. Just want to say pay attention the sirens if they do go off. Don't dally in getting to safe shelter. Just keep an eye on the weather report and have the weather radar up on your phone in times of questionable weather.
While there I saw 2 tornados and they are nothing to mess with. I had a 1963 Chrysler New Yorker at the time (this was in the 70's) and it went through more than a few hail storms. One storm had golf ball sized hail and all my neighbors cars were dented up like mad. That 'real car' New Yorker not a single dent. That's when they used real American steel in cars.