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Fujita Scale
- 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.
news.uchicago.edu/explainer/fujita-scale-explained
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What is the EF Tornado Scale?
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How do tornado ratings work?
The EF Scale primarily classifies tornadoes based on the damage left behind. By surveying the damage, scientists assign a wind speed that is likely to have caused that damage. There are 28 categories that range from flagpoles and power lines all the way up to schools and high-rise buildings.
The Fujita scale (F-Scale; / f u ˈ dʒ iː t ə /), 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.
ScaleWind Speed Estimate[7](mph)Wind Speed Estimate[7](km/h)Frequency[15]F040–7264–11644.14%F173–112117–18034.24%F2113–157181–25316.17%F3158–206254–3324.35%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.
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
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%May 4, 2024 · This is why a measurement system for estimating the intensity of tornadoes after their impact was devised, a system known today as the Enhanced Fujita Tornado Intensity Scale.
The Fujita Scale is a well known scale that uses damage caused by a tornado and relates the damage to the fastest 1/4-mile wind at the height of a damaged structure. Fujita's scale was designed to connect smoothly the Beaufort Scale (B) with the speed of sound atmospheric scale, or Mach speed (M).
