Winter rain is not an ancient almanac game.

Most of the reasons are that dust, ice crystals and other substances in the friction air are positively charged and negatively charged respectively after some complicated processes when rolling in the cloud. After exercise, heavier substances with the same charge will reach the lower part of the cloud (generally negative charge), and lighter substances with the same charge will reach the upper part of the cloud (generally positive charge). In this way, the collection of charges of the same sex forms some charge centers. When the air between the charged centers of the opposite sex is broken down by its strong electric field, "cloud discharge" (that is, lightning) is formed. When negatively charged clouds approach the ground downwards, the protrusions and metals on the ground will be induced to be positively charged. With the gradual enhancement of the electric field, Lei Yun will form a downward guide, and objects on the ground will form an upward flashover. When they meet, they will form a discharge to the ground. This is easy to cause lightning disasters. Lightning is formed in the process of atmospheric movement, which is caused by intense triboelectricity and the cutting of magnetic lines by clouds. The most common shape of lightning is dendritic, in addition to spherical, flaky and banded. The forms of lightning are cloud lightning, cloud lightning and cloud lightning. When lightning strikes between clouds, the friction between clouds forms lightning.

It also thunders in winter. This is just a small opportunity. There are few chances of strong convective weather in winter, but sometimes strong cold air goes south, which will also make the warm and humid air near the ground rise rapidly in some areas. At this time, the ground temperature is secondary, and the temperature difference between the ground and the sky is very important.

The air near the ground rises rapidly. On the one hand, the sudden drop in temperature is easy to cause clouds and snow. On the other hand, it is normal that the rapidly rising air rubs violently, accompanied by lightning. Thundering in winter is rare in China, but it often happens in Toronto in winter.