A deadly patchwork of destructive cyclones is on an apocalyptic path of convergence at a populated Midwest city center. There, the twisters will merge into one mega tornado that threatens to obliterate the cities for hundreds of miles around.
2001
1999
1971
1991
1962
1992
2008
2009
1984
1994
1967
2000
2004
2005
2010
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1997
1953
