The most tornado-prone area in the United States is called "Tornado Alley," which is generally understood to include Texas, Oklahoma, Kansas and Nebraska. Tornado Alley stretches up through the Midwest to Ontario. Southern Illinois, Missouri, western Kentucky, western Tennessee, the lower Ohio valley and northern Mississippi are also prone to tornadoes. The United States experiences the most tornadoes of any country, and it is followed closely by Canada.
Between 2000 to 2010, the United States averaged 1,274 tornadoes per year. Between 1991 and 2010, Texas had 155 tornadoes per year, Kansas had 96, Oklahoma had 62, Arkansas had 39, Missouri had 45, Illinois had 54, Nebraska had 57, Iowa has 51, Wyoming had 53, Florida had 66, Minnesota had 45 and Mississippi had 45. On the other end of the spectrum, Alaska and Rhode Island average zero tornadoes per year. Hawaii, Massachusetts, New Hampshire and Vermont average one, and Nevada and Maine average two.
Outside of the United States, the United Kingdom and the Netherlands experience the most tornadoes of any of the European countries. Other areas prone to tornadoes include Argentina, Uruguay, southern Brazil in South America, New Zealand, Australia, Bangladesh and eastern India. South Africa experiences the most tornadoes on the African continent.