Tornado Parameters News Today

>> you were tracking this storm and this front for a good 48 hours before it hit. what made this different? what about it made you know this was going to be a big problem? >> reporter: you know whats interesting, the tornado parameters werent as high as they were yesterday -- or, as they were two days ago. so that kind of surprised me a little bit. but it looked like just from watching the radar and the satellite, that something came into the backside of this. and the tornado, you have air motio...