In terms of the Fujita/Enhanced Fujita scale rating, you cannot simply judge the intensity based on the appearance, but generally, rapid rotation and large debris indicate an intense tornado. In terms of type, large tornadoes and tornadoes connected to wall clouds are usually supercell-type tornadoes. Tornadoes that appear to consist of a tube of dust may be landspouts.
it matters where it is
No. The best we can do is prepare for them.
it stays on the ground until it weakens
In truth, scientists aren't sure.
It is impossible to tell when the next tornado will be for any location.
in most of the Midwest region called tornado alley
If there is a tornado happening right at the moment, you probably will be running to saftey/shelter and not packing clothes.
tell us what is happening, and maybe we can help
the tornado kind
A tornado is a kind of vortex so yes, in some ways.
A tornado is itself a kind of vortex, and can have smaller vortices inside of it.
A tornado emergency is a special kind of tornado warning that is issued when a large tornado is threatening a populated area. A tornado emergency indicates a more dangerous situation than an ordinary tornado warning.