What is the Enhanced Fujita Scale (EF Scale)?

The Enhanced Fujita Scale (EF Scale) is a modernized version of the original Fujita Scale, used to classify tornadoes based on the damage they cause. Implemented in 2007, the EF Scale provides a more accurate assessment of wind speeds by incorporating improved engineering analysis of structural damage.

The scale ranges from EF0 (weakest) to EF5 (most severe), with each category representing an estimated range of wind speeds and the associated destruction. EF0 tornadoes cause minor damage, such as broken branches and shallow-rooted trees being overturned, while EF5 tornadoes can completely destroy well-built homes and cause extreme devastation.

Unlike the original Fujita Scale, the EF Scale refines wind speed estimates to better reflect actual damage patterns. It uses 28 different damage indicators, including types of buildings, trees, and other structures, to determine an accurate tornado rating.

For those considering storm shelters or safe rooms, understanding the EF Scale is crucial. An EF5 tornado can produce winds exceeding 200 mph, making a properly installed tornado shelter essential for protection against the most violent storms.