It is a century since a powerful tornado ripped through three U.S. states, killing hundreds and injuring thousands.

The Enhanced Fujita Scale provides an estimated range of a tornado's wind speeds, based on the tornado's damage.

Modern standards qualify the so-called Tri-State Tornado as an F5, a mile-wide funnel with wind ... when “married perfectly,” produce long-track, violent tornadoes, Wielgos said.

Modern standards qualify the so-called Tri-State Tornado as an F5, a mile-wide funnel with wind ... when “married perfectly,” produce long-track, violent tornadoes, Wielgos said.

It left 695 people dead and more than 2,000 injured, not counting the casualties from at least seven other twisters that the ...

In illustrated calendars, the Kiowa depicted a tornado as the long, violent tail of a horse ... tornado of 1947—an F5 tornado that killed 116 people in the Sooner State. They studied reams ...

The violent tornado that forever scarred Moore ... Both scales range from F0/EF-0 (“weak”) to F5/EF-5 (“incredible”), with the top of the scale representing winds of 323 km/h or stronger. Out of all ...

Even by Plains standards, this was an unusually large, violent tornado outbreak so early in spring. One Kansas tornado was ...