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How are tornadoes rated using the EF scale?
What is the Enhanced Fujita Tornado Scale?
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The Fujita scale (F-Scale), also known as the Fujita-Pearson scale, is a tornado scale that was introduced in 1971 by Tetsuya Fujita. In the United States the Fujita scale was replaced with the Enhanced Fujita scale (EF-Scale), which is now the primary scale used the United Sites and Canada.
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The Fujita scale (F-Scale; / fuˈdʒiːtə /), or Fujita–Pearson scale (FPP scale), is a scale for rating tornado intensity, based primarily on the damage tornadoes inflict on human-built structures and vegetation.
University of Chicago meteorologist Ted Fujita devised the Fujita Scale, the internationally accepted standard for measuring tornado severity. His goal was to create categories that could separate weak tornadoes from strong ones. The F Scale also met a need to rate both historical and future tornadoes according to the same standards.
The Enhanced Fujita scale (abbreviated as EF-Scale) rates tornado intensity based on the severity of the damage they cause. It is used in some countries, including the United States and France. [1] The EF scale is also unofficially used in other countries, including China. [2]
ScaleWind Speed Estimate[17](mph)Wind Speed Estimate[17](km/h)Frequency[18]EFUN/AN/A3.11%EF065–85105–13752.82%EF186–110138–17732.98%EF2111–135178–2178.41%Aug 17, 2021 · A tornado is assigned a rating from 0 to 5 on the Enhanced Fujita Scale to estimate its intensity in terms of damage and destruction caused along the twister’s path.
- Brian Donegan
- 6 min
May 4, 2024 · Since 2007, the EF Scale has been used to rate tornadoes. The Enhanced Fujita Scale provides an estimated range of a tornado's wind speeds, based on the tornado's damage. - Articles from...
The EF scale is used in two ways. First, it is used to rate the intensity of damage to individual damage indicators along the damage path. This allows contouring of damage intensity, particularly useful for strong (EF/F2 and EF/F3) to violent (EF/F4 and EF/F5) tornadoes.
