What is the sign of thunder in early winter?

There are signs of thunder in beginning of winter:

There is a folk saying that it is not good to thunder after winter begins. Beginning of winter has a saying that when it thunders, "when it thunders in winter, ten cowsheds are nine empty".

But from a scientific point of view, thunder in beginning of winter is not a special case. Meteorologists say that thunder is not common in winter, but it is not a "vision". Because under the control of continental cold air mass, the air is cold and dry in winter, the solar radiation is weak, and the air is not easy to form strong convection, so the probability of lightning is relatively small.

But less doesn't mean it's meaningless. Whether it thunders or not depends not on the temperature itself, but on the temperature difference between the upper and lower temperatures in the air. In winter, if the temperature difference between the upper temperature and the lower temperature is too large, the air will be unstable, the cold air in the upper layer will sink, and the warm air in the lower layer will rise, thus intensifying convection and triggering winter thunder.

The omen of thunder in early winter:

1, thunder in winter indicates that the weather will be very cold, which is an ominous sign.

2. An agricultural proverb says, "Thunder at the beginning of winter will turn into opposition in spring."

3, "Thunder hits winter, ten cowsheds are nine empty", and thunder in winter indicates that the weather is cold, there is much snow and ice, and even cows may freeze to death.

4. "When it rains, the ground shakes." He believes that the thunder in winter is caused by the indiscriminate killing of creatures in spring and summer. If human beings do not repent, warm winds will blow in winter, causing pests to wreak havoc and plagues all over the world.

5. "There are thieves everywhere when it thunders after autumn." They believe that the occurrence of the winter thunder is due to the ruthless administration and abnormal statutes of the imperial court, so the sky is falling and thieves are rampant.