Tornado Alley
Although the official boundaries of Tornado Alley are not clearly defined, its core extends from northern Texas, Oklahoma, Kansas, Nebraska, into South Dakota. States such as Missouri, Iowa, Minnesota, Wisconsin, Illinois, Indiana, and western Ohio are sometimes included in Tornado Alley. Some research suggests that tornadoes are becoming more frequent in the northern parts of Tornado Alley where it reaches the Canadian prairies.
Tornado (ProSlide ride)
The first Tornado slides opened at Mountain Creek Waterpark, Six Flags Hurricane Harbor: New England and Splashin' Safari in 2003. To this date, ProSlide has installed 97 Tornados.