Yes its on now
No machine is used. The intensity of a tornado is determined by a visual survey of the damage.
it matters where it is
Yes. It matters on the strength of a tornado though. It would usually takes at least an EF3 tornado to do this.
The name of the episode is Cyclone and it is in the 4th season.
Welcome Kangaza
If there is a tornado watch what you have to remember is that it does not mean there is an imminent threat of tornadoes. Even when you area is under a tornado watch, your chances of actually having a tornado are still quite small.
A tornado watch means that general weather conditions are right for tornadoes to form, even if there is no imminent threat. If there is immediate danger of a tornado then a tornado warning will be issued. To help you remember, a tornado watch simply tells you to watch out.
F2 or EF2
Make a tornado with a spear in it :p
It hit nine towns and the only one I remember the name of was Gorham which was completely destroyed by the tornado.
It can last from anywhere to a few seconds or over an hour. It just matters where you live.
Stay indoors, listen to the radio, take in loose objects that are outside, etc. But remember that even in a tornado watch, the odds that you actually get hit by a tornado are very low.