English: A map of the frequency of
F3 and greater intensity tornadoes by area. The darker colors highlight the areas typically known as a
Tornado Alley.
A map of the frequency of
F3 and greater intensity tornadoes by area. The darker colors highlight the area typically known as
Tornado Alley. '''Source:''' Image from a booklet from [http://www.fema.gov/index.shtm
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