With building design and structural integrity taken more into account, winds in an EF4 tornado were estimated to between 166 mph (267 km/h) and 200 mph (320 km/h). Ultimately, a new scale was devised that took into account 28 different damage indicators this became known as the Enhanced Fujita scale. įollowing two particularly devastating tornadoes in 19, engineers questioned the reliability of the Fujita scale. F4 tornadoes were estimated to have had maximum winds between 207 mph (333 km/h) and 260 mph (420 km/h). The scale ranks tornadoes from F0 to F5, with F0 being the least intense and F5 being the most intense. In order to assess the intensity of these events, meteorologist Ted Fujita devised a method to estimate maximum wind speeds within tornadic storms based on the damage caused this became known as the Fujita scale. Each year, more than 2,000 tornadoes are recorded worldwide, with the vast majority occurring in North America and Europe. Tornadoes are among the most violent known meteorological phenomena. These scales – the Fujita scale, the Enhanced Fujita scale, the International Fujita scale, and the TORRO tornado intensity scale – attempt to estimate the intensity of a tornado by classifying the damage caused to natural features and man-made structures in the tornado's path. This is a list of tornadoes which have been officially or unofficially labeled as F4, EF4, IF4, or an equivalent rating. ( October 2022)ĮF4 damage to a residence from the 2011 Tuscaloosa–Birmingham tornado The Windsor–Tecumseh Tornado of 1946 F4/EF4 Tornadoes in the United States 1950-2019 This list is incomplete you can help by adding missing items.
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