Why are tornadoes most common in the central states?
The most common tornadoes are in the USA The area of the US called "tornado alley" seems to get the most tornadoes. This area includes parts of Texas, Oklahoma and Kansas. Texas, Oklahoma, Kansas, Nebraska, South Dakota, Iowa, Colorado, and Wyoming all are or have some part of themselves in Tornado Alley Tornadoes are most common in the United States, particularly on the central plains.
Tornadoes can occur almost anywhere, but they are most common in the central and southern United States. Other major tornado forming regions include Bangladesh, Argentina, and South Africa. Tornadoes are generally most common in spring and early summer in the U.S. and early in the summer monsoon in Bangladesh. In terms to time of day, tornadoes can can occur at any time but are most common in the late afternoon and early evening.
According to the page at the link to the bottom of this post, most tornadoes occur in the central states in the USA. These states have been nicknamed "Tornado Alley." Other than the USA, places where tornadoes tend to occur are Western Europe and Eastern India. There's a map on this page which gives a graphical representation of where tornadoes occur, globally. http://library.thinkquest.org/03oct/01424/where_do_tornadoes_occur.htm
Tornadoes have occurred in all 50 U.S. states. In the U.S. tornadoes are generally most common and strongest in the central and southeastern regions. The primary reasons is that cold fronts meeting warm, moist air from the Gulf of Mexico frequently trigger strong thunderstorms. Wind shear then gives these storms the rotation they need to produce tornadoes.