wiki说的更准确。
Tornado Alley (also known as Tornado Valley) is a loosely defined location of the central United States and Canada where tornadoes are most frequent.[1] The term was first used in 1952 as the title of a research project to study severe weather in areas of Texas, Louisiana, Oklahoma, Kansas, South Dakota, Iowa, Nebraska, and New York.

【 在 randomh 的大作中提到: 】
: 那也看怎么分
: 一般都叫西部牛仔
: 没有中部牛仔  
: ...................
--
FROM 175.160.217.166