The deadliest tornado in recorded U.S. history occurred 100 years ago. The Tri-State Tornado touched down in southeastern ...

This photo provided by the Jackson County (Ill.) Historical Society shows the Logan School in Murphysboro ... spawned which ...

AP) — From Logan School's top floor ... spawned which spun off through Kentucky and into Alabama. Modern standards qualify the so-called Tri-State Tornado as an F5, a mile-wide funnel with ...

(AP) — From Logan School's top floor ... spawned which spun off through Kentucky and into Alabama. Modern standards qualify the so-called Tri-State Tornado as an F5, a mile-wide funnel with ...

The deadliest tornado in recorded U.S. history occurred 100 years ago MURPHYSBORO, Ill. -- From Logan School's top floor ... spawned which spun off through Kentucky and into Alabama.