In my mind the only way to prepare is to pray every day. No need to get all worked up about what might or might not be around the corner.
There is something quite impressive about tornadoes, both in their violence, and seemingly discrimate path. No wonder it's dubbed "The finger of God"
But besides that, I'm striken by the very low death toll, compared to the total damage. Furthermore, the communities reaction and pulling together is heart warming.
I leave to others their own religious interpretations, but I see much positive hidden in this tragedy.
While I feel for Trinity who seem to have a personal connection due to her proximity - and those who lost a loved one -, we must all realize this is more a close call, then an actual catastrophy, and that most of the damage was mostly material, which can and will be rebuilt, there or elsewhere.
Both the sufficiant warning and communications to avert a much bigger death toll, and the communities exceptional reaction does not spell doom to me. Au contraire, these people directly affected lead the way with their hopes of rebuilding.