Whiled it's true that a tornado can and will strike anywhere nature chooses, it remains a bit of a phenomenon why Lincoln seems to almost always miss the most severe activity.
I have watched radar on incoming storms of all levels for 20 years and when it gets close to Lincoln, it invariably splits and goes around or simply dissipates.
What is really surprising to me is that no one seems to have done any significant meteorological studies to explain it. (or at least none that I have seen).
It would seem that this would be a prime subject for some research.