Hurricane :
A violent cyclonic storm with torrential rain and thunderstorms and wind velocity over 117 km ( 73 mi ) per hour ( often exceeding 160 km : 100 mi per hour ), originating in latitudes 5 degree to 20 degree North over the west Atlantic, moving west-northwest over the Caribbean Sea and the Gulf of Maxico to Florida, then northeast at about 30 degree North along eastern cost of the USA.
CYCLONE, TROPICAL REVOLVING STORM, TYPHOON.
Tornadoe :
A violent anticlockwise, very destructive, shortlived revolving storm ( sometimes termed a twister in USA ), usually accompanied by rain and thunder, associated with an intensely low pressure system, with wind velocities estimated to exceed 320 km per hour ( 200 mph ), in some examples travelling a nearly straight track at between 16 and 80 km per hour ( 10 and 50 mph ), and with a dark, funnel shaped cloud ( FUNNEL CLOUD ), small in diameter, appearing to grow downwards from dark CUMULONIMBUS cloud. Such a tornadeo is particularly common in the Mississippi basin in the afternoons in spring and early summer where warm humid air from the Gulf of Mexico meets cool, dry air from the north, and when the heating of the land surface is at its greatest. It may travel only a short distance ( some 30 km per hour : 18 mph ) and last under two hours, but in that time it mows down anything in its path,
TROPICAL REVOLVING STORM.
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