There is no way of saying for certain. The apparent increase in tornado activity over the past 60 or so years is due largely to our improved ability to detect and confirm weaker tornadoes. U.S. statistics for stronger tornadoes show no overall increase in activity.
yes they are
There is some evidence that tornado frequency might be increasing but it is difficult to determine as with more advanced technology and greater knowledge of tornadoes we are now finding tornadoes that we would have previously missed.
There is no real evidence that the number of cyclones or tornadoes is increasing outside of normal fluctuation. The apparent number has increased as advanced technology has made us better able to detect and identify storms, and fast communications means we hear about more events sooner.
With increasing population growth and suburban sprawl there is more opportunity for tornadoes to kill people can cause major damage. The tornadoes themselves are not becoming stronger or more dangerous. In fact, the number of strong tornadoes in the United States has actually decreased in the past 60 years.
Tornadoes are sometimes divided into "weak" tornadoes "strong" and "violent" tornadoes. Weak tornadoes are those rated EF0 and EF1. Most tornadoes are weak. Strong tornadoes are those rated EF2 and EF3. Violent tornadoes are those rated EF4 and EF5. They are the rarest of tornadoes, only about 1% of tornadoes are this strong.
Tornadoes in the U.S. are called tornadoes.
It depends on what you mean by extreme. Tornadoes of EF4 and EF5 tornadoes, however are often referred to as violent tornadoes. These account for about 1% of all tornadoes.
Tornadoes don't get named, Hurricanes do, but Tornadoes don't.
Florida frequently has tornadoes, though several states have more tornadoes annually.
There are several levels of advisory involving tornadoes, but only two are actual warnings. Here they are in order of increasing severity:Convective outlook mentioning a risk of tornadoes. (can be issued several days in advanceSevere weather outlook mentioning tornadoes. (tornadoes may be possible)Tornado Watch. (Conditions are favorable for the formation of tornadoes)PDS Tornado Watch. (Particularly Dangerous Situation, strong tornadoes are likely)Tornado Warning. (A tornado has been spotted or one may form soon)Tornado Emergency. (A large, strong tornado is threatening a populated area)Note that a PDS tornado watch is a variant of tornado watch, and a tornado emergency is a variant of tornado warning.
No. Tornadoes are dangerous.
No. Tornadoes are violent.