Trains now have cameras mounted and here is one facing the rear as a train passes through a tornado. At about 40 seconds the rain starts and it goes from bad to worse from there.
http://d.yimg.com/kq/groups/7769081/124862335/name/Tornado1.wmv
http://d.yimg.com/kq/groups/7769081/124862335/name/Tornado1.wmv