Inside the funnel, the air sinks, and outside it rises, rotating rapidly. An area of ​​highly rarefied air is created. Determining the speed of air movement in the funnel is still a serious problem. Basically, estimates of this value are known from indirect observations. Depending on the intensity of the vortex, the speed of the flow in it can vary.
It is believed that it exceeds 18 m / s and may, according to some systems, reach 1300 km / h. The tornado itself moves along with the cloud that generates it. This movement can give speeds of tens of km / h, usually 20-60 km / h. According to indirect estimates, the energy of an ordinary tornado with a radius of 1 km and an average speed of 70 m / s is comparable to the energy of a reference atomic bomb, similar to the one detonated in the United States during the Trinity tests in New Mexico on July 16, 1945.