Yes. The United States gets more tornadoes than any other country.
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.
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.
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.
The majority of UK tornadoes are not recorded. So most statistics on the number of recorded tornadoes in the UK are usually around 70. Most UK tornadoes happen in the countryside (so don't get noticed) and are very small (usually). It is common belief that more tornadoes happen in the UK than in the US (tornado ally included) - Although US tornadoes are way bigger and stronger than those in the UK and so more are likely to be noticed and therefore recorded. Tornadoes in the UK usually happen in the summer when the weather conditions are right.
It varies from year to year, but the average is about 1200.