A delicate rope-shaped tornado strikes the El Reno, Oklahoma, airpark on April 24th, 2006. This tornado is unusual in that it rotated clockwise (anticyclonic in the northern hemisphere).

A shelf cloud from a severe thunderstorm travels down a desolate stretch of highway in western Nebraska.

The circular base of a rotating thunderstorm spins it's way across the prairies of western Oklahoma. This storm produced hail to the size of baseballs.

Images courtesy Weatherpix

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