Three tornadoes converge to wreak havoc on Chicago, disrupting the power grid and creating the worst super-storm in history: a category 6 twister.
8 April 1963, South Bend, Indiana, USA
19 May 1968, Winnipeg, Manitoba, Canada
28 March 1948, Kansas City, Missouri, USA
28 February 1958, Winnipeg, Manitoba, Canada
31 December 1970, Edmonton, Alberta, Canada
March 27, 1990 in Canada
28 February 1973, Saskatoon, Saskatchewan, Canada
11 September 1963, Newmarket, Ontario, Canada
1978 in Australia
18 October 1966, Poughkeepsie, New York, USA
March 21, 1978 in Winnipeg, Manitoba, Canada
3 July 1962, Charleston, South Carolina, USA
5 March 1983, Los Angeles, California, USA
