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2. Enhanced Fujita scale - Wikipedia

   en.wikipedia.org/wiki/Enhanced_Fujita_scale

   The old scale lists an F5 tornado as wind speeds of 261–318 mph (420–512 km/h), while the new scale lists an EF5 as a tornado with winds above 200 mph (322 km/h), found to be sufficient to cause the damage previously ascribed to the F5 range of wind speeds.

3. Tornado outbreak of April 17–19, 1970 - Wikipedia

   en.wikipedia.org/wiki/Tornado_outbreak_of_April...

   Heading northeast at 40 mph (64 km/h), the tornado produced a continuous path 26 mi (42 km) long and 1 ⁄ 2 mi (0.80 km) in width before lifting and possibly reforming as a new tornado. It then redeveloped for 20 mi (32 km) between Canyon and Happy , causing a much narrower, 50-to-75-yard-wide (46 to 69 m) swath of damage.

4. Fujita scale - Wikipedia

   en.wikipedia.org/wiki/Fujita_scale

   F5. 261–318 mph. Incredible. 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. The official Fujita scale category is determined by meteorologists and engineers after a ground or ...

5. Tornado intensity - Wikipedia

   en.wikipedia.org/wiki/Tornado_intensity

   Tornado intensity is the measure of wind speeds and potential risk produced by a tornado. Intensity can be measured by in situ or remote sensing measurements, but since these are impractical for wide-scale use, intensity is usually inferred by proxies, such as damage. The Fujita scale, Enhanced Fujita scale, and the International Fujita scale ...

6. Tri-State tornado outbreak - Wikipedia

   en.wikipedia.org/wiki/Tri-State_tornado_outbreak

   Continuing to the northeast at an average speed of 62 mph (100 km/h) (and up to 73 mph (117 km/h)), the tornado cut a swath almost 1 mi (1.6 km) wide through the city of Murphysboro, a thriving coal shipping center and railroad town of 10,000. The tornado leveled all but the extreme southeastern side of town, where many densely populated ...

7. Hurricane Audrey - Wikipedia

   en.wikipedia.org/wiki/Hurricane_Audrey

   Farther north, in Canada, 15 people were killed in Ontario and Quebec. Strong winds and torrential rainfall disrupted transportation services. In Quebec, ten people were killed in the Montreal area, making Audrey the deadliest hurricane to strike the Canadian province in recorded history. The storm was also considered the worst storm to strike ...