On the afternoon of August 28th, around 16: 40, a small town in Wendeng District, Weihai City, Shandong Province was suddenly attacked by a tornado, causing 9 minor injuries and 167 house damage. At this time, other parts of Weihai are still sunny and unaffected. So how did tornadoes form? In fact, the formation of tornadoes has a lot to do with the disparity in temperature difference between the upper and lower parts.

Many times, tornadoes occur in summer, which has a lot to do with the weather conditions in summer. Because the formation of a tornado requires four conditions: flat land or water surface, strong convective air, strong wind and humid air. These four conditions are indispensable.

When the ground or water temperature is about 30 degrees and the upper air temperature is as low as -30 degrees, the temperature difference between the upper and lower parts is very large, which will lead to the rapid decline of cold air in the upper air and the rapid rise of warm air on the ground, thus forming many small eddies. Because the air is humid, the warm air will quickly cool down after rising to high altitude, forming a cloud, which will drive the surrounding wet air to cool down continuously, resulting in the volume of the gas above becoming smaller and needing to be supplemented by the surrounding air. This makes many small eddies form larger eddies under the catalysis of strong winds, and tornadoes are born. After the tornado is formed, it will cause a strong pressure difference around it, and this strong pressure difference will make the tornado expand and rotate upwards, and at the same time push the tornado forward and destroy many things along the way.

Because of the destructive power of tornado, where it passes, it will lead to serious consequences such as uprooting trees, damaging houses and overturning vehicles, and human beings will suffer greatly.