About the thunderstorm weather in America!

Lightning is a discharge phenomenon in the atmosphere. In the process of lightning formation, one part accumulates positive charges and the other part accumulates negative charges. When these charges accumulate to a certain extent, discharge will occur. Some of this discharge occurs between clouds and some between clouds and the ground. The latter discharge, that is, lightning, will damage buildings and electrical equipment and hurt people and animals. This discharge time is short, but the current is extremely strong, reaching tens of thousands to hundreds of thousands of amperes. When discharging, it produces strong light, which is lightning. When lightning strikes, it will release a lot of heat energy, which can instantly raise the air temperature by 1000 ~ 20000℃ and the air pressure can reach 70 atmospheres, which is very severe. Lightning strikes are often located in soil with low soil resistivity, such as areas with metal deposits, river banks, underground outlets, land bordering rice fields on hillsides, and border areas with different soil resistivity; It is also vulnerable to lightning strikes in lakes, low-lying areas and places with high groundwater level. In addition, the ground facilities are also an important factor affecting the lightning strike selectivity. Towering buildings are vulnerable to lightning. In the wilderness, even if the building is not high, it is relatively isolated and prominent, and it is more vulnerable to lightning strikes. There are many accidents in which pavilions, grass sheds, water carports and so on that rest in the wild are struck by lightning. The structure, internal equipment and state of a building have a great relationship with lightning strike selectivity. Buildings with metal structures, factories with large metal bodies inside, or houses that are often wet inside are more vulnerable to lightning strikes because of their good conductivity. It mainly occurs in the central and southern United States, in summer and autumn. When two strong cold and warm air meet, it will be produced. The southeast coast of Florida Peninsula belongs to the maritime monsoon climate, so the Atlantic circulation brings cold air, which meets warm air and produces thunderstorms.