Tornadoes have happened almost month of every year in the United States. If you are referring to the most recent outbreak of tornadoes it lasted from April 14-16, 2011.
If you are asking about another incident, please be more specific.
Tornadoes can happen at any time of year but they are most common in sprind and early summer.
Tornadoes in the U.S. are called tornadoes.
Tornado Alley runs from NE Texas northeastward all the way through to the Canadian border... See link!
Because the Rocky Mountains help provide cold air and the central plains is flat and the moisture from the Gulf of Mexico is so rich in moisture it helps with instability that helps with tornadoes.
There were 1132 recorded tornadoes in the U.S. in 1991.
Most tornadoes in the U.S. happen in spring and early summer.
Tornadoes have ocurred in all 50 U.S. states.
No. Tornadoes can occur almost anywhere that gets thunderstorms.
Tornadoes can happen at any time of year but they are most common in sprind and early summer.
Yes. The United States gets more tornadoes than any other country.
Tornadoes can occur just about anywhere in the U.S. but they are most common on the Great Plains.
It varies, but in an average year, the U.S. gets between 1,200 and 1,300 tornadoes.
It is called Tornado Alley.
Tornadoes can happen in any place that gets thunderstorms.
Tornadoes happen in Miami for the same reason they happen anywhere else. See the related question for how tornadoes form in general.
It varies from year to year, but the average is about 1200.
Tornadoes have occurred in all 50 states. However. Most tornadoes happen in or near the area known as tornado alley, which extends north from Texas to South Dakota and includes parts of some adjacent states.