What is the difference between a f4 and f5 tornado?
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.