There have been at least 6,717 confirmed tornadoes in the U.S. in the past 5 years. This number may actually be higher as the figures for April through June of 2011 are still preliminary.
Statistics world wide are not available as many countries to not keep records of their tornadoes, but tornadoes, some of them deadly, have occurred in almost all parts of the world and on every continent except Antarctica.
Yes. Some tornadoes may last for more than an hour, but such cases are rare. Most tornadoes do not last more than 10 minutes.
The U.S. had 1282 tornadoes in 2010.
There were 85 tornadoes confirmed on April 14, 2012.
They don't, usually. Most tornadoes don't last more than a few minutes. The tornadoes that do last along time are usually produced by exceptionally strong thunderstorms with very powerful updrafts. Such updrafts are not easily disrupted, and the disruption of the updraft is usually what "kills" a tornado.
Tornadoes usually last only a few minutes, some only for seconds. However, a few tornadoes can go for a couple of hours.
In the past five years tornadoes have caused about $30 billion in damage in the U.S., most of it in 2011.
In the latest five-year period (not counting 2011 as statistics are not finalized) the U.S. experienced 6329 tornadoes.
Georgia has experienced an estimated 211 tornadoes in the past 5 years (spanning 2007-2011). Data for 2011 is still preliminary.
In the past 25 years Bloomington-Normal has had 2 tornadoes
The Last Five Years was created in 2001.
In the past 10 years tornadoes at least 1402 people have been killed by tornadoes, including 1089 in the United States.
In the past 5 years tornadoes in the U.S. have caused over $16 billion worth of damage. More than half of that occurred in 2011.
I have written lots of books the last five years
The duration of a tornado can vary considerably. Most tornadoes last less than five minutes, but major tornadoes can easily last half an hour to an hour. A handful of tornadoes have lasted for more than three hours. At the other end, some tornadoes last only a few seconds.
too many to count
There have been many over the years. The last one was in April 2016.
Yes, as it was not before, since this last years the Dominican Republic had been afected by some small tornadoes, which are formed in the North of the country. It's due to the climatic changes in the recents years. But are small tornadoes, not as in the USA.