It snows on the fifteenth day of the first month. Will there be a flood before August?

If it snows on the fifteenth day of the first month, there will be no flood before August. There is a saying that it snows on the fifteenth day of the first month, and it snows in Yun Zheyue on the fifteenth day of August. This is about the phenomenon of snowing lights and Yun Zheyue. On the surface, it is the echo of clouds and snow, but in essence it is the echo of two cold air activities.

Because if there is cold air activity around the Mid-Autumn Festival, it will cause the phenomenon of "Yun Zheyue". There will be cold air intrusion, forming a situation of "snow hits the lights". Therefore, the proverb "It snows and lights on August 15th and January 15th in Yun Zheyue" is a reflection of the rhythmic activity of the cold air invading China for about five months.

Moreover, according to this proverb, many meteorological stations have studied the law of cold air activity and applied it to long-term weather forecast, and achieved good results;

In fact, the weather between other days also has this rhythmic relationship, but it has not been widely noticed.