Why does it often thunder in spring?

This is because in spring, the temperature rises and warms, and the water vapor rises, forming thick clouds, and the cloud saturation reaches the critical value, and it collides with rainfall and thunder.

Lightning is a positive and negative discharge phenomenon caused by the violent collision of convective clouds. When the temperature rises in spring and summer, the ground updraft and high-altitude cold air flow form convective clouds, which are easy to produce electronic clouds in violent collisions. When they reach the discharge distance, they will produce discharge and form lightning. Winter is mainly controlled by the northwest airflow, and the temperature is low, so there is little chance for the formation of convective clouds.

Thundering all year round is a normal weather phenomenon. 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.

Extended data:

People often say: spring thunder comes early in good years, or: March thunder refers to the March of the lunar calendar, that is, early spring. In the folk, people usually think that spring thunder indicates a good year with good weather.

"Twenty-four solar terms set" says: "Sting, February Festival." "Called the first summer. Sting, words sting. Everything is shocked, and it is thunder, so it is called shocking. It's an escaped cockroach. "There is a proverb that says,' Thunder thunders, it's warm, and the old toad sings folk songs', and' Thunder strikes, it shakes Gu Mi, and it shakes Remy into mud'". This means that hearing thunder on the day or after the thunder is a good sign, which indicates that the weather is good and it is a good year.

References:

Baidu Encyclopedia-Thunder (Natural Phenomenon)

Baidu Encyclopedia-Spring Thunder (Meteorological Term)