Tornado classifications have evolved since the original Fujita (F scale) was developed in 1971. Under the original F scale, an F5 rating was given as follows: “Whole frame houses tossed off ...
The scale ranked these tornadoes from F0 (weakest) to F5 (strongest). The exact rank is determined by meteorologists and engineers after conducting surveys of damage from a particular storm.
Even by Plains standards, this was an unusually large, violent tornado outbreak so early in spring. One Kansas tornado was most iconic.
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