Here is the list of the Top 25 deadliest tornadoes in the United States. The Joplin tornado Sunday has unfortunately made this list (At #8)
1 18 Mar 1925 Tri-State (MO/IL/IN) 695
2 06 May 1840 Natchez MS 317
3 27 May 1896 St. Louis MO 255
4 05 Apr 1936 Tupelo MS 216
5 06 Apr 1936 Gainesville GA 203
6 09 Apr 1947 Woodward OK 181
7 24 Apr 1908 Amite LA, Purvis MS 143
8 22 May 2011 Joplin MO 126
9 12 Jun 1899 New Richmond WI 117
10 8 Jun 1953 Flint MI 115
11 11 May 1953 Waco TX 114
11 18 May 1902 Goliad TX 114
13 23 Mar 1913 Omaha NE 103
14 26 May 1917 Mattoon IL 101
15 23 Jun 1944 Shinnston WV 100
16 18 Apr 1880 Marshfield MO 99
17 01 Jun 1903 Gainesville, Holland GA 98
17 09 May 1927 Poplar Bluff MO 98
19 10 May 1905 Snyder OK 97
20 24 Apr 1908 Natchez MS 91
21 09 Jun 1953 Worcester MA 90
22 20 Apr 1920 Starkville MS, Waco AL 88
23 28 Jun 1924 Lorain, Sandusky OH 85
24 25 May 1955 Udall KS 80
25 29 Sep 1927 St. Louis MO 79