The Tri-State Tornado barreled across more than 200 miles, decimating entire towns in and leaving thousands homeless on March 18, 1925.

The deadliest tornado in recorded U.S. history struck 100 years ago, touching down in Missouri and tearing up everything in its path through southern Illinois and into Indiana.

By Rich McKay and Tatiana Bautzer (Reuters) -Portions of West Virginia, Ohio and Pennsylvania were under a new tornado watch issued on Sunday by the National Weather Service, as the death toll from storms rose to at least 34 people in six states since Friday.

One hundred years ago on this date, the Tri-State Tornado was the deadliest twister ever recorded. But was it the longest?

The deadliest twister in recorded U.S. history struck 100 years ago Tuesday, touching down in southeastern Missouri and tearing up everything in its 219-mile (352-kilometer) path for nearly four hours through southern Illinois and into Indiana.

The Tri-State Tornado destroyed whole towns and killed almost 700 people in Southern Indiana and Illinois 100 years ago.