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The 1977 Birmingham–Smithfield F5 tornado's damage was surveyed by Ted Fujita and he "toyed with the idea of rating the Smithfield tornado an F6". [13] In 2001, tornado expert Thomas P. Grazulis stated in his book F5–F6 Tornadoes; "In my opinion, if there ever was an F6 tornado caught on video, it was the Pampa, Texas tornado of 1995". [14]
The International Fujita scale (abbreviated as IF-Scale) rates the intensity of tornadoes and other wind events based on the severity of the damage they cause. [1] It is used by the European Severe Storms Laboratory (ESSL) and various other organizations including Deutscher Wetterdienst (DWD) and State Meteorological Agency (AEMET).
For purposes such as tornado climatology studies, Enhanced Fujita scale ratings may be grouped into classes. [52] [53] [54] Classifications are also used by NOAA's Storm Prediction Center to determine whether the tornado was "significant". This same classification is also used by the National Weather Service.
A typical tornado has winds of 110 miles per hour (180 km/h) or less, is about 250 feet (76 m) across, and travels about one mile (1.6 km) before dissipating. [citation needed] However, tornado behavior is variable; these figures represent statistical probabilities only.
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Learn about the formation and characteristics of hurricanes, typhoons and tornadoes.
The smaller Tornado has many similarities with the F-111, however the Tornado differs in being a multi-role aircraft with more advanced onboard systems and avionics. [60] The level of wing sweep (i.e. the angle of the wings in relation to the fuselage) can be altered in flight at the pilot's control. The variable wing can adopt any sweep angle ...
As of January 2024: 104(Maximum number of aircraft planned for deployment) F-16 Fighting Falcon: United States multirole F-16C: 726 726 F-16C total force as of September 2023 (USAF Almanac). [1] 418 F-16C - Active. 258 F-16C - Air National Guard. 50 F-16C - Reserve. 708 F-16C operational (WAF 2025). [2] Trainer aircraft listed separately. F-22 ...