One knot is equal to 1.1.5078 miles her hour. 1 mile per hour is equal to 0.868976 knots. A knot dervives not from mph but latitude; it takes 1 minute of time to travel one minute of latitude.
In terms of traveling speed tornadoes can be stationary or travel at over 70 mph. The average forwards speed is 35 mph. In terms of wind speed, winds in a tornado can travel at anywhere from 65 mph to over 300 mph. The average tornado probably has winds in the range of 80 to 90 mph. Tornadoes that cause the most serious damage have winds over 130 mph. Tornadoes with winds over 200 mph are very rare.
An EF5 tornado has an estimated wind speed of over 200 mph (miles per hour,) while an EF4 has wind speeds from 166 up to 200 mph. The scale approximates the intensity of a tornado. "F" stands for the Fujita Scale, with "EF" standing for the Enhanced Fujita Scale. Both rate tornadoes based on engineered wind estimates and damage descriptions. Both F4 and F5 tornadoes are ranked as "intense" and "violent," but the difference between the ratings can only be determined by Doppler Radar data and other technical meteorological measures. See the Wikipedia article linked below for further information and sources. In more detail, an EF4 tornado will level a well built house and blow away ones of with less integrity. An EF5 will wipe well built houses clean off their foundations.
F2 wind speeds were originally esitmated at 113-157 mph. The new Enhanced Fujita scale has adjusted that estimate to 111-135 mph.
There is no such thing as an E4 tornado. You most likely mean an EF4 tornado. The estimated winds for an EF4 tornado are 166-200 mph. That is equivalent to a category 5 hurricane (winds 156 mph or greater).
check your answer
42 knots = 48.333 mph
2 MPH = 1.73795248 Knots (Roughly)
20 knots is about 23.02 miles per hour (knots x 1.150779448 = mph).
130 knots = about 149.6 mph
i knot in mph is 0.868976242 knots so 503 mph is 437,095049726 knots
The speed of 150 knots is equal to 172.6 mph (the conversion is 1.15077945 miles/nautical mile).
17 knots=19.56 mph
About 5.2 knots.
Use this formula to convert knots to miles per hour: knots x 1.15 = mph25.3 knots x 1.15 = about 29.11 mph
11 knots = 12.65 mph
8 knots is about 9.2 mph.
600 knots is about 690.5 mph.