This is just so awful to look at. I woke up at 3 in the morning, and saw the warnings on the plateau then. I went back to bed, because I figured it was "radar indicated" and surely it wouldn't get bad further east while we were only under a "marginal" risk. I was shocked when I awoke to this news.
As far as I know, this was mainly one supercell that wouldn't die. Even after the tornado dissipated, high winds and hail were reported as far east as Jefferson Co in east TN, caused by the same storm.
My takeaway from this is you don't need an "outbreak" of tornadoes to have devastation over a wide area. One supercell thunderstorm can accomplish that on it's own when it travels this far and lives this long.