How to Measure Tornadoes: The EF Scale
Tornado outside of Erie Kansas
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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.
See how to predict a tornado.
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