Keywords: Tri-State Tornado map.PNG Original track map of the 219-mile 3 5 hour Tri-State Tornado which killed 695 in Missouri Illinois and Indiana on 18 March 1925 Wilson John W and Stanley A Changnon Jr 1971 Illinois Tornadoes Circular 103 Illinois State Water Survey Urbana-Champaign IL PD-USGov Tornado track maps |