Since 2007, meteorologists have used the Enhanced Fujita Scale (EF Scale) in order to assign ratings to tornadoes. This rating comes from estimated wind speed and related damage. Scientists survey tornado damage according to a list of Damage Indicators (DI) and a list of Degrees of Damage (DoD). These lists help form estimates of wind speed ranges for tornadoes. Then, they assign a rating from EF0 to EF5. We’ll explain each of these categories in more detail below.