Florida, by far
No, Florida gets more tornadoes than California.
Generally speaking, yes. The Midwestern states overall have more tornadoes than the other states. The one exception is Florida, which has a comparable number of tornadoes to Oklahoma, though Florida tornadoes are generally weaker than Midwestern tornadoes.
Florida frequently has tornadoes, though several states have more tornadoes annually.
Florida has more tornadoes annually than Illinois, though it certainly is not in first place.
No. In fact dues to the sea breeze being near the ocean can actually make it more likely that tornadoes will occur. Florida, for example, rivals Tornado Alley in number of tornadoes per area unit.
Florida experiences warm weather year round, however in the later winter and early spring the upper atmosphere is cold, which makes for an unstable atmosphere if the lower atmosphere remains warm. This, combined with a cold front can lead to thunderstorms that can produce tornadoes.
Florida generally experiences more tornadoes than Arizona. This is due to the geographical location and climate of Florida, which is prone to severe weather conditions that are conducive to tornado formation, such as strong thunderstorms and hurricanes. Arizona, on the other hand, has a drier climate and is less prone to tornadoes.
Tornadoes are more likely to occur in early summer.
Tornadoes are more likely to occur on the central plains and in the Deep South. These regions are known as Tornado Alley, and Dixie Alley with another area of high activity in Florida.
As of May 15 already been two confirmed tornadoes in Florida in 2012. In all likelihood there will be more as tornadoes hit Florida every year. However, there is no way of telling where or when these tornadoes will hit or how many.
Tornadoes are more likely to form along a cold front, but they can occasionally form along a warm front. Many tornadoes form in an area called Larko's triangle, between a warm front and cold front. Some tornadoes form along a dry line, and in fact a try line can be more proficient at producing tornadoes than a cold front. Still other tornadoes form from tropical systems, which do not involve any sort of front.