text:  Also, the updraft in the thunderstorm leads to the ice skater effect. If you've ever watched a figure skating performance, at the end, the skaters usually want to end with a bang, with a nice finale, and so that they bring their arms in and they spin much more quickly. This is what is happening then in the thunderstorm. As the air is rushing into the storm at low levels, it takes that rotation and it can really concentrate it, which helps us to get a tornado.