Some famous tornadoes that have hit the U.S. include:
The St. Louis, Missouri tornado of May 27, 1896. This F4 tornado killed 255 people, making it the third deadliest tornado in U.S. history.
The Tri-State tornado of March 18, 1925. This mile wide F5 tornado tore a record 219 mile long damage path across parts of Missouri, Illinois, and Indiana killing 695 people and injuring over 2000, making it the deadliest tornado in U.S. history. In addition to path length this tornado also holds the records for fastest forward speed (at times 73 mph), and duration (3 hours, 29 minutes).
The Flint, Michigan tornado of June 8, 1953. This F5 tornado tore a path through parts of Flint and Beecher, Michigan killing 116 people. It was the tenth deadliest tornado in U.S. history, the deadliest in Michigan history, and the last tornado in the U.S. to kill more than 100 people until 2011.
The Lubbock, Texas tornado of May 11, 1970. This slow moving F5 tornado tore through the city of Lubbock, killing 26 and injuring over 500. High rise buildings in downtown Lubbock suffered major structural damage with one building being literally twisted.
The Wichita Falls, Texas tornado of April 10, 1979. This F4 tornado tore through the city of Wichita falls, killing 42 and injuring over 1700. At the time it occurred it was the costliest tornado in U.S. history and would hold that title for 20 years. This tornado is known for the people who tried to evacuate from the tornado only to die in their cars.
The Oklahoma City tornado of May 3, 1999. This F5 tornado tore through suburbs on the southern and eastern sides of Oklahoma City, killing 36 and injuring 583. At the time it occurred it was the costliest tornado in U.S. history with damage in modern amounts approaching $1.4 billion. It would hold this title for 12 years. Doppler radar measured winds in this tornado at just over 300 mph, leading to the popular but untrue story that the tornado was an F6.
The Tuscaloosa, Alabama tornado of April 27, 2011 as part of the 2011 Super Outbreak. This EF4 tornado (equivalent to an F4) tore through the city of Tuscaloosa and suburbs on the north and west sides of Birmingham, killing 64 people and injuring over 1500. Damage totaled $2.2 billion, making it the costliest tornado in U.S. history at the time, though it would hold this title for only 3 weeks. It was the second deadliest tornado in Alabama history. Alabama's deadliest tornado, with a death toll of 72, occurred on the same day.
The Joplin Missouri tornado of May 22, 2011. This EF5 tornado (equivalent to an F5) tore through the south side of Joplin, killing 158 people and injuring over 1100. This makes it the seventh deadliest tornado in U.S. history and the deadliest since 1947, a time before tornado warnings. The tornado destroyed a third of Joplin with damage totaling $2.8 billion, making it the costliest tornado in U.S. history
The United States averages about 1,200 tornadoes each year, some years have more and some have less.
No. Tornadoes are, in simple terms, caused by strong thunderstorms encountering wind shear. While there could be some teleconnections that influence tornadoes, we could still have tornadoes with or without them.
The Andes are the most famous in South America
Every state has had at least a few weak tornadoes.
The top five states with the most tornadoes are:TexasOklahomaKansasFloridaNebraska
Tornadoes are most famous for causing death and destruction.
wikipedia.com gives all famous types of tornadoes and tornado records
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All 50 states get tornadoes though they are rare in many of the states.
The U.S. averages about 1200 tornadoes per year.
There were 1692 confirmed tornadoes in the U.S. in 2011.
Tornadoes can form almost anywhere in North America but occur most often on the central plains of the United States.