What does the old rural saying "thunder hits winter, ten cowsheds are nine empty" mean?

What does the old rural saying "thunder hits winter, ten cowsheds are nine empty" mean?

We all know that it seldom thunders in winter, which is a natural law of nature. This rural old saying means that when it thunders in winter, the winter climate will be changeable, sometimes cold and sometimes warm, and there will be many ice and snow days, which is very likely to cause extreme weather, resulting in nine times out of ten cattle freezing to death.

Although this sentence is a bit exaggerated, it is not unreasonable. It's rare to have thunder in winter, but when it thunders in winter, it will be particularly cold if there is more ice and snow.

The formation of lightning must meet three conditions, that is, there is enough water vapor in the air, the power of warm and humid air rising, and the air can produce up-and-down convective movement of distance. In spring and summer, it is easy to meet these three conditions, so there are more thunderstorms in spring and summer, but it is difficult to meet these three conditions in autumn and winter, so there are fewer thunderstorms, especially in winter.

Through long-term observation, the ancients found that once it thundered in winter, that is, in February, October and February of the 65438 lunar calendar, it was often cold and hot, and the weather was erratic. If you don't pay attention at this time, it will easily lead to the death of frozen cows in the cowshed.

Thunderstorm weather occurs in winter in some years because when there is strong warm and humid airflow in a certain area and the weather is warmer, strong cold air will go south in the north, so that the cold and warm air will meet, and the light warm and humid airflow will rise rapidly due to the influence, while the heavy cold air will drop rapidly, which will directly lead to the instability of the atmospheric structure, thus meeting the conditions for the formation of thunderstorm weather, and thus thunderstorms or thunderstorms will occur. If the warm and humid airflow in the air is particularly strong, the convective movement generated by it is too strong, and even hail weather may occur.

Although the ancients couldn't explain the principle clearly at that time, they found the influence of this result, so they summed up the classic agricultural proverb "Thunder can't move winter, and ten cowsheds are nine empty". In fact, this sentence is also reasonable today!