What is the hail?

Hail is also called "hail", commonly known as hail, and some areas are called "Lengzi" (such as Xuzhou), which is the most common in summer or at the turn of spring and summer. It is some ice particles as small as mung beans and soybeans and as big as chestnuts and eggs. The water on the local surface is vaporized by the sun and then rises into the air. A lot of water vapor condenses into clouds, and after being liquefied by cold air, the dust in the air is used as the condensation core to form raindrops, and the raindrops are getting bigger and bigger. If there are more clouds, it will rain. If exposed to cold air without condensation nuclei, water vapor will condense into ice or snow, which is snow. If the temperature drops sharply, it will form a bigger ice mass, which is hail.

Except for Guangdong, Hunan, Hubei, Fujian, Jiangxi and other provinces, China suffers from hail disasters to varying degrees every year. Especially in the mountainous and hilly areas in the north, the terrain is complex, the weather is changeable and there are many hail, which is very harmful to agriculture. Heavy hail destroyed crops and houses, injured people and killed livestock. Extraordinary hail is bigger than grapefruit, which will kill people, destroy a large area of farmland and trees, and destroy buildings and vehicles. It has powerful lethality. Hail disaster is one of the most serious disasters in China.