With tornadoes the traditional F(Fujita) classification is based on how much damage the wind does. There is a correlation to windspeed. but the final verdict is

With tornadoes the traditional F(Fujita) classification is based on how much damage the wind does. There is a correlation to windspeed. but the final verdict is based on damage done. https://en.wikipedia.org/wiki/Fujita_scale https://en.wikipedia.org/wiki/Fujita_scale https://en.wikipedia.org/wiki/Enhanced_Fujita_scale https://en.wikipedia.org/wiki/Enhanced_Fujita_scale