Fujita scale
SCALE FOR RATING TORNADO INTENSITY
F-5 tornado; Fujita-Pearson Scale; Fujita tornado scale; Fujita-Pearson tornado scale; Fujita-Pearson Tornado Scale; Fujita tornado intensity scale; Fujita-Pearson tornado intensity scale; Fujita tornado damage scale; Fujita Scale; Dames and Moore Tornado Scale; Dames and Moore Scale; Twisdale Scale; Twisdale Tornado Scale; FPP scale; FPP tornado scale; Fujita-Pearson scale; Fujita Intensity Scale; F6 tornado; F2 tornado; F5 tornado; F3 tornado; Fujita–Pearson scale; F1 tornado; F0 tornado; F4 tornado; F6 tornadoes
The Fujita scale (F-Scale; ), or Fujita–Pearson scale (FPP 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 or aerial damage survey, or both; and depending on the circumstances, ground-swirl patterns (cycloidal marks), weather radar data, witness testimonies, media reports and damage imagery, as well as photogrammetry or videogrammetry if motion picture recording is available.