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How to Measure Tornadoes: The EF Scale

Tornado outside of Erie Kansas

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Amy Price
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The EF Scale

The Old Farmer's Almanac
November 12, 2021
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The EF Scale is the standard way to measure tornadoes based on wind damage.

The original Fujita Scale (or F Scale) was developed by Dr. Theodore Fujita. All tornadoes, and other severe local windstorms, were assigned a number according to the most intense damage caused by the storm.

The enhanced F Scale (EF Scale) was implemented in the United States on February 1, 2007. The EF scale uses three-second wind gust estimates based on a more detailed system for assessing damage, taking into account different building materials.

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See how to predict a tornado.

Weather References
Tornadoes

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grifftion (not verified)

4 years 2 months ago

this does not have a author

the author is writer by the founder or owner of this site, so the site name is sufficent

max (not verified)

6 years 5 months ago

this was not helpful

james (not verified)

6 years 5 months ago

This is helpful to me because you are probably not understanding it as much as I am so ask for help.