August 15th is covered with clouds and fog, and the fifteenth day of the first month is bright! What is the scientific basis?

There is a proverb called "August 15th, Yun Zheyue, it snows and lights are lit on the 15th day of the first month", which means that if the Mid-Autumn Festival on August 15th is cloudy and the moon is covered, it will often snow on the Lantern Festival on the 15th day of the first month.

Why are the weather related between two holidays about 150 days apart? It turns out that this is a manifestation of atmospheric rhythmic activity. Many studies at home and abroad show that a certain weather process is obvious at a certain moment, becomes obvious after a period of time under certain conditions, or takes other forms due to different seasons. "Yun Zheyue" and "Snow Lantern" are usually associated with cold air activities. In other words, if there is cold air activity around the Mid-Autumn Festival, it will cause the phenomenon of "Yun Zheyue". Then around the Lantern Festival, there will be cold air invading, resulting in "snow lanterns".

Therefore, the proverb "On August 15th, Yun Zheyue, it snows and lights on the 15th day of the first month" is a reflection of the rhythmic activity of the cold air invading China for about five months. According to this proverb, many weather stations have studied cold air activities ... There is a proverb called "It snows in Yun Zheyue on August 15th, and it falls on the 15th day of the first month", which means that if the Mid-Autumn Festival on August 15th is cloudy and the moon is covered, it will often snow during the Lantern Festival on the 15th day of the first month.

Why are the weather related between two holidays about 150 days apart? It turns out that this is a manifestation of atmospheric rhythmic activity. Many studies at home and abroad show that a certain weather process is obvious at a certain moment, becomes obvious after a period of time under certain conditions, or takes other forms due to different seasons.

"Yun Zheyue" and "Snow Lantern" are usually associated with cold air activities. In other words, if there is cold air activity around the Mid-Autumn Festival, it will cause the phenomenon of "Yun Zheyue". Then around the Lantern Festival, there will be cold air invading, resulting in "snow lanterns". Therefore, the proverb "On August 15th, Yun Zheyue, it snows and lights on the 15th day of the first month" is a reflection of the rhythmic activity of the cold air invading China for about five months. According to this proverb, many meteorological stations have studied the rhythm relationship of cold air activities for about five months, and have been used for weather forecasting for a long time, and achieved good results.