When the volume of water vapor shrinks when it is cooled, the gas in the surrounding supplementary space is uneven and forms a tornado.
The process of tornado formation: water on the ground absorbs heat and turns into water vapor, which rises to the upper layer of the steam layer in the sky. Due to the low temperature of the upper layer of the steam layer, the volume of water vapor shrinks and the specific gravity increases. The steam falls. Due to the steam layer The temperature below the layer is high, and it absorbs heat during the descent. It rises again when it encounters cold, and then descends. Repeatedly, the gas molecules gradually shrink and are finally concentrated at the bottom of the vapor layer, forming a low-temperature zone at the bottom.
Water vapor concentrates in low-temperature areas, forming clouds. The cloud gradually becomes larger, the temperature difference between the upper and lower clouds inside the cloud becomes smaller and smaller, the water vapor molecules rise and fall more and more, the up and down convection inside the cloud becomes more and more intense, and the water vapor rising below the cloud rises straight up.
As the water vapor molecules rise, they shrink in volume when cooled, forming a funnel shape. The volume of the rising water vapor molecules continues to shrink when cooled, and the gas molecules under the clouds continue to replenish the space, resulting in strong winds