Springtime brings out the weather fans and they converge on the American Midwest to catch a tornado.
Storm chasing is a growing pastime and was made popular after the movie Twister hit the big screens. and continues to draw interest with a variety of TV shows on cable.
For a quick little introduction to Storm chasing, see:
Bristow, Robert S.; Cantillon, Heather. Tornado Chasing, Parks & Recreation. Sep2000, Vol. 35 Issue 9, p98. 8p.