Yes, I know about the Mayfield tornado. That was also in December and is an extreme exception. Like I said, I know it CAN happen, but I believe, statistically it's far less likely. That is absolutely not to say life changing outbreaks can't happen without it. I'm just talking about exceptionally violent. Long track tornadoes.
Mayfield really is fascinating though. Some people believe it was the longest tornado track ever and the NWS's call about when it lifted was questionable. It wasn't just long tracked, it was on the ground for an eternity.