Why does beginning of winter thunder?

The rain and thunder in early winter show that the whole winter is cold, rainy and snowy, and it is prone to some extremely cold weather. The old rural proverb "Ten cowsheds are empty when it thunders in winter" shows that if it rains and thunders at the beginning of winter, nine out of ten cows will freeze to death.

Scientifically explaining the thunderstorm in winter means that when the hot and humid air in a certain area gets warmer, the cold air in the north will be stronger and the wet and cold air will meet. Light warm and humid airflow will rise rapidly, while heavy cold air will fall rapidly, which will directly lead to the instability of atmospheric structure, and then thunderstorm or thunderstorm weather will occur. If the hot and humid airflow in the air is particularly strong, the convective movement caused by it will be too strong, and even hail weather may occur.