The Fujita scale (F-Scale), or Fujita-Pearson scale, is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation. The official Fujita scale category is determined by meteorologists (and engineers) after a ground and/or aerial damage survey; and depending on the circumstances, ground-swirl patterns (cycloidal marks), radar tracking, eyewitness testimonies, media reports and damage imagery, as well as photogrammetry/videogrammetry if motion picture recording is available.

Tornado rating by wind speeds:

F Scale
F# MPH|-00faf4 F0 -ffffcc F1 -ffe775 F2 -ffc140 F3 -ff8f20 F4 -ff6060 F5 261-318