What are the signs of thunder in winter?

There is no sign of thunder in winter.

In winter, sometimes the temperature is high and the warm and humid air flow is strong. The cold air in the north occasionally moves south, and the warm and humid air is forced to rise, and the convection intensifies, forming thunderstorm clouds, generating lightning and rain and snow. Convection is particularly strong, and it can also form hail, which will produce the so-called "thunder in winter" weather phenomenon.

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, and it is not repeated often, 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.

Brief introduction of lightning 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.