11 Tri-State Tornado Records. The Tri-State Tornado is currently the U.S. record holder for longest tornado track (219 miles), most deaths in a single tornado (695), and most injuries in a single tornado (2027). The Tri-State Tornado of 1925 has been labeled the worst tornado in U.S history.

The storm completely destroyed a number of towns and caused 695 deaths.

1925's Tri-State tornado is considered the deadliest in United States history. Three states were affected by the Tri-State Tornado: Illinois, Indiana and Missouri. The damage was estimated at $16.5M and in 2011 adjusted dollars that is approximately $1.4B. While it occurred before the modern record, it is considered by all accounts to be a F5/EF5 Tornado. Passing through eastern Missouri, southern Illinois and southern Indiana, it killed 695 people and injured an estimated 13,000 people, causing $17 million in property damage. It is the deadliest tornado in U.S. history with 695 confirmed fatalities. General Tri-State Tornado Facts. In this theory, the storm continuously evolves, and the decay of one supercell leads to the development of another—and so forth. The Tri-State Tornado is considered the most intense tornado in recorded history. 1. Known as the “Tri-State Tornado,” the deadly twister began its northeast track in Ellington, Missouri, but southern Illinois was the hardest hit. Tri-State Tornado of 1925, also called Great Tri-State Tornado, tornado, the deadliest in U.S. history, that traveled from southeastern Missouri through southern Illinois and into southwestern Indiana on March 18, 1925. Findings from modern weather records and research suggest that a tornado that endures as long as the Tri-State Tornado actually results from a cyclical supercell rather than one massive storm. It is the second deadliest tornado in world history, only surpassed by the 1989 Daultipur-Saturia Tornado. Beginning in Ellington, Missouri and ending in southern Indiana, southern Illinois was the hardest of the three states hit. The Tri-State Tornado occurred on Wednesday, March 18th in 1925.