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Fujita Scale of Tornado Intensity

Uploaded by: mikewx2
Video Description:
The Fujita scale (F-Scale), or Fujita-Pearson scale, is a scale for rating tornado intensity, based on the damage tornadoes inflict on 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.
The scale was introduced in 1971 by Tetsuya "Ted" Fujita of the University of Chicago who developed the scale together with Allen Pearson (path length and width additions in 1973), head of the National Severe Storms Forecast Center (predecessor to the Storm Prediction Center) in Kansas City, Misso
uri. The scale was applied retroactively to tornado reports from 1950 onward for the National Oceanic and Atmospheric Administration National Tornado Database in the United States, and occasionally to earlier infamous tornadoes. Tom Grazulis of The Tornado Project also rated all known significant to
rnadoes (F2-F5 or causing a fatality) in the U.S. back to 1880. Previously used in most areas outside of Great Britain, it was superseded in 2007 by the Enhanced Fujita Scale in the United States.

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