The NEW Tornado Scale

By: Rodney Harris Email
By: Rodney Harris Email

After the devastating twister that struck Greensburg, Kansas, you may have noticed that the tornado was considered an EF 5, as opposed to an F5?!

Largely based on it's predecessor (the Fujita Scale), the Enhanced Fujita Scale became the official scale for ranking tornadoes in February 2007.

As many already know, the strength of a tornado isn't actually measured until after the storm has hit! Tornado strength is measured based on the damage it leaves behind, and there were many doubts based on the original scale.

While the principle scale remains the same, a lot of revisions and enhancements were made to account for variables such as vegetation and building structure.

























































NEW EF Scale Old
F Scale
  Winds Damage Winds
EF 0 65-85 mph Light F0 < 73
mph
EF 1 86-110 mph Moderate F1 73-112
mph
EF 2 111-135 mph Considerable F2 113-157
mph
EF 3 136-165 mph Severe F3 158-206
mph
EF 4 166-200 mph Devastating F4 207-260
mph
EF 5 > 200 mph Incredible F5 261-318
mph


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