What is the phenomenon of thunder, rain and snow?

Thunderstorm, also known as thunder and winter, refers to the weather phenomenon of thunder or thunder when it snows in a certain area in winter.

This kind of weather is rare, and the folk proverb says "it thunders and snows in winter", which is a precursor to a snowstorm. The main reason of "thunderstorm, rain and snow" is that the warm and humid airflow was strong before, and the cold air came down to produce strong convective weather, which triggered lightning activity. Since the winter of 2009, thunder and rain have occurred in many cities in China. The ancients classified thunder in solar terms as spring thunder.