The Tornado Scale

The Fujita-Pearson scale or more popularly known as the F scale, is used to measure the intensity of a tornado based on the amount of damage done by a passing tornado over an area.  The scale was introduced in 1971 and is named for Ted Fujita who was a professor at the University of Chicago.

F5 Scale

The F scale rates a tornado from F0 all the way to F5 with a F5 tornado having the fastest wind speeds and causing the most damage.

An F0 Tornado

  • Have wind speeds between 40-72 mph
  • Causes light damage.
  • Branches breaks off of trees and pushes over smaller trees.

An F1 Tornado

  • Have wind speeds between 73-112 mph
  • Causes moderate damage.
  • Tiles breaks off of roofs.  Cars and trailers gets pushed

An F2 Tornado

  • Have wind speeds between 113-157 mph
  • Causes considerable damage.
  • Roofs gets torned off.  Big trees get toppled.  Mobile homes are destroyed.  Heavy cars are lifted and thrown.

An F3 Tornado

  • Have wind speeds between 158–206 mph
  • Causes Severe Damage.
  • Roofs torned off even on the most well constructed structures.  Trains are overturned.

An F4 Tornado

  • Have wind speeds between 207-260 mph
  • Causes Catostrophic Damage
  • Well constructed structures are leveled.  Structures with weak foundations are blown away.

An F5 Tornado

  • Have wind speeds between 261–318 mph
  • Causes Total Damage
  • Few if any structures are left standing.   Cars become missles flying in the air.

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