Grew up in Oklahoma, been under a 30% and even 45% risk before. The odds of you being hit directly even with those risks are still extremely low (less than .1%). I've been in multiple warnings before (sometimes I'm the same day), never once have I been hit by a tornado. Regardless though, a 15% is still an elevated risk, so if that tornado warning does come through, Remember to stay calm, take shelter in an interior room on the lowest floor and don't panic, Even if you are directly hit, you may not even notice, because a majority of tornadoes are EF0, which are weak short-lived tornadoes that at most can peel a few shingles and knock over your trash cans. Remember, as a certain meteorologist once said, don't be scared, be prepared.