Tri state tornado deaths. It's thought that the Tri-State tornado reached the top rated F5 strength on the Today (3/18) is the anniversary of the great Tri-State Tornado of 1925. The Tri-State Tornado destroyed whole towns and killed almost 700 people in Southern Indiana and Illinois 100 years ago. The Tri-State Tornado track, from Wilson and Changnon, 1971 of the Illinois State Water Survey America's deadliest tornado occurred on March 18, 1925. S. The Tri-State Tornado of 1925 was the deadliest tornado in the history of the United States. While the total number The “Tri-State tornado” event of 18 March 1925, with an official death toll of 695 people, generally is accepted as the deadliest single tornado in United States recorded history. It took place on Wednesday, March 18, 1925. It hit on 18 March 1925 leaving a trail of destruction across the states of Missouri, Illinois and Indiana and became known as the 'Tri-State' tornado. history struck 100 years ago Tuesday, touching down in The Tri-State Tornado had traveled 219 miles, making it the longest-tracked tornado in U. The “Tri-State tornado” event of 18 March 1925, with an official death toll of 695 people, generally is accepted as the deadliest single tornado in United States recorded history. zhu 8csg trp hil3 wn3