What kind of weather does a tornado form in?

Tornado is the strongest vortex phenomenon in the atmosphere. Tornadoes often occur in thunderstorm weather in summer, especially in the afternoon and evening. Although the scope of influence is small, it is extremely destructive.

Tornadoes, a natural phenomenon, are the product of thunderstorms in clouds. Specifically, a tornado is a form in which a small part of the huge energy of a thunderstorm is released in a small area. The formation of tornadoes can be divided into four stages:

Cumulonimbus clouds that can produce tornadoes are all giant cumulonimbus clouds. In the process of cloud-sky discharge, the positive charge at the top of the cloud is much greater than the negative charge at the bottom of the cloud. After the cloud is neutralized by lightning, the negative charge at the cloud bottom is insufficient, and the cloud with a large number of positive charges forms a strong electric field with the ground. Under the action of electrostatic attraction, positively charged clouds protrude downward from the bottom of the clouds, and negatively charged air gathers from all around for electric neutralization. At the bottom of the cumulonimbus cloud, a funnel cloud appears first, and the surrounding air rotates at high speed.

If the positive charge in the cloud is large enough, the funnel cloud will quickly extend to the ground or water surface, and a tornado will form when it meets the surface. The cloud column of a tornado is a downward moving cloud airflow with a large number of positive charges. There is a strong electric field between the cloud column and the ground. Although the electric field is not enough to cause lightning, it can produce strong negative ion flow (electron flow) on the ground or water surface. Driven by the negative ion flow, the air rises rapidly, forming a low pressure area. Under the action of atmospheric pressure, the surrounding air converges to the center of low pressure, and the converged air accelerates to rise under the action of negative ion flow. The converging airflow is influenced by the earth's rotation bias. Tornadoes rotate counterclockwise in the northern hemisphere and clockwise in the southern hemisphere. The above air movement makes the pressure at the bottom of the tornado lower and lower and the wind speed stronger and stronger.

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