How do tornadoes come about?

Tornado is a strong cyclone, which often appears during storms and thunderstorms. It can be seen in many parts of the world that the natural conditions in North America are particularly conducive to the formation of tornadoes. Its geographical distribution is closely related to the gradual northward movement of storms and thunderstorms in spring and summer. Thunderstorms in subtropical areas often occur in hot and humid afternoons. Some of the most violent thunderstorms, hailstorms and rainstorms are simply earth-shattering, thus forming tornadoes. Usually, the omen of a tornado is a funnel-shaped cloud, in which the cyclone rolls up from the ground and the sediment rises and falls under the cloud. This funnel-shaped cloud turns faster and bigger, touches the ground down, and rolls up a lot of dust, sediment, gravel and so on. Specifically, a tornado is a form in which a small part of the huge energy of a thunderstorm is released in a small area.

Its upper end is connected with thunderstorm clouds, its lower end is suspended in mid-air, and some directly extend to the ground or water surface, and move forward while rotating. In thunderstorm clouds, the air disturbance is very intense, and the temperature difference between the upper and lower parts is very large. On the ground, the temperature is more than 20 degrees Celsius. The higher the altitude, the lower the temperature. At the top of the cumulonimbus cloud at an altitude of more than 8 thousand meters, the temperature is as low as MINUS 30 degrees Celsius. The instability of the atmosphere produces a strong updraft, which makes the cold air flow above drop rapidly and the hot air below rise violently. When the updraft reaches high altitude, if it encounters strong horizontal wind, it will force the updraft to "upside down" (rotate downward). Due to the alternating disturbance at high altitude, it rotates and forms many small eddies. These small eddies gradually expand. When the developing vortex reaches the ground, the ground air pressure drops sharply and the ground wind speed rises sharply, forming a tornado.