It isn't. The Fujita scale is the traditional tornado rating system, and it was the first to be developed.
The Fujita and Enhanced Fujita scales assesses damage caused by a tornado to assign a rating.
Enhanced Fujita
The Fujita scale uses the severity of the damage a tornado causes to determine its rating.
The highest Fujita rating for a tornado is F5, which represents winds of 261-318 mph (419-512 km/h). F5 tornadoes are considered to be the most powerful and destructive, capable of causing catastrophic damage.
The most common Fujita scale rating is F0 (EF0 on the Enhanced Fujita scale).
Tornadoes are rated on the Enhanced Fujita scale, which replaced the Fujita scale in 2007.
The correct spelling of the term is "Fujita scale" (tornado rating scale named for scientist Tetsuya Fujita).
The highest rating for a tornado is EF5 on the Enhanced Fujita scale or F5 in the original Fujita Scale. Winds in these tornadoes can exceed 300 mph.
The F-scale or Fujita scale was developed by Dr. Tetsuya Theodore Fujita as the University of Chicago in 1971. The highest rating on the scale is F5.
fujita scale
EF stands for Enhanced Fujita scale, which is used to classify tornado intensity based on the damage caused. EF2 on the scale indicates a tornado with estimated wind speeds of 111-135 mph that can cause considerable damage.