However, not every tornado shown off in Twister and Twisters ... Kicking off the duology's F5 tornadoes is the very first storm in the series, the 1969 Oklahoma tornado that killed Jo's father.

Every individual, family ... Damage from the 1999 F5 tornado that struck Moore, Oklahoma. Photo courtesy NOAA. Dr. T. Theodore Fujita developed the Fujita Tornado Damage Scale (F-Scale) to ...

Grazulis believes Worcester was probably an F5, although ... I’m going through every single path length prior to 1970. Why then? At some point you have to determine when tornadoes started ...