Fujita-Pearson scale"(Abbreviated FPP scale.) Characterizes a tornado's intensity (F) by its path length (PL) and path width (PW). The six-point scale for PL and PW is as follows.
FUJITA-PEARSON SCALE A scale that classifies the severity of wind damage intensity based on the degree of destruction as it relates to the wind speed as well as path length and path width of the event.
FOUSForecast Output United StatesFPOFlood Potential OutlookFPSFujita-Pearson ScaleFQTFrequentFractocumulusA cumulus cloud presenting a ragged, shredded appearance, as if torn.
speed is estimated and thus not comparable with direct measurements by Doppler radar. Class F5 tornadoes are rare. The scale was introduced in 1971 by Tetsuya Theodore Fujita and Allen Pearson and is also known as the Fujita-Pearson Scale.
Tornadoes are classified on the Fujita-Pearson scale according to their maximum wind velocity from F0 to F5. More than 60% of tornadoes are F0 or F1, with wind velocities not exceeding 180 kmph.
Theodore Fujita of the University of Chicago. Also known as the Fujita-Pearson Scale. Full duplex Operation mode of a communication circuit in which each end can simultaneously transmit and receive.
 See also: Normal, Tornado, Rain, Surface, Low
  
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