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87 knots is about four-fifths as fast as a Tornado
In other words, it's 0.8106705 times the speed of a Tornado, and the speed of a Tornado is 1.233547 times that amount.
(EF2) (wind speed range average)
According to the Enhanced Fujita scale implemented by the US National Oceanographic and Atmospheric Administration, a "significant" tornado has an Enhanced Funjita scale classification of EF2 and is characterized by wind gust speeds between 95.587390 knots and 119.0497 knots. The largest recorded tornado — an F4 event occurring in Nebraska in May, 2004 — was almost 4.02 km (2.5 mi) across.
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