Why does it thunder in winter?
In winter, because the air is cold and dry, the solar radiation is weak, and convection is not easy to form in the air, so lightning is rare. But in winter, sometimes the temperature is high and the warm and humid air flow is strong. When there is occasional strong cold air going south in the north, warm and humid air is forced to rise, and convection intensifies, thus forming thunderstorm clouds, lightning and thunder, and the convection is particularly strong, and hail can also be formed, which will produce weather phenomena such as "thunder in winter" or "thunder in winter". ?
Weather phenomena:
Although the phenomenon of "thunder can't stop winter" is rare, it is not unique, and it occurs in many parts of the country. If the weather is cold and hot, there will be more opportunities for the phenomenon of "thunder and winter". Under the influence of strong warm and humid airflow and strong cold air, the warm and humid air in the lower layer was forced to rise, resulting in strong convection, which created conditions for the formation of lightning. After the "beginning of winter", "thunder entered the winter" appeared.
Through the long-term careful observation of the phenomenon of "thunder in winter", the public summed up the law of "thunder and snow in winter", that is, thunder in winter means that the air humidity is high and it is easy to form rain and snow; There is also a folk saying that "when it thunders in winter, ten cowsheds are empty", which means that when it thunders in winter, the warm and humid airflow is very active and the cold air is also very strong. It's so cold and snowy that even cows may freeze to death.
Extended data
Formation process:
The formation of lightning must meet certain conditions, that is, there must be enough water vapor in the air, there must be power to make warm and humid air rise, and the air must be able to produce strong convection up and down. There are many thunder and lightning in spring and summer, because the warm and humid airflow is active, the air is humid, and the solar radiation is strong. The air near the ground is constantly heated and rises, forming a strong convection up and down, which is prone to thunder and lightning. In autumn and winter, because the air is cold and dry, the solar radiation is weak, the air is not easy to form violent convection, and lightning rarely occurs. However, when the strong warm and humid air flows northward and the cold air is forced to rise, strong convection will also occur, and lightning will appear when it reaches a certain intensity.
Baidu Encyclopedia-Donglei
Baidu Encyclopedia-Dong Lei