When is the once in 23 years heavy snow?

Heavy snow time in 2023: February 7, 2023 17: 32.

Every year around 65438+February 7 in Gregorian calendar, when the sun reaches 255 degrees of the Yellow Meridian, it is a "heavy snow" solar term. "Twenty-four solar terms" said: "Heavy snow, solar terms in November, so far there is also much snow." Because "snow" is a product of cold, representing cold and rainy weather, this solar term is characterized by a significant drop in temperature, and strong cold air can often bring rain or snow.

The heavy snow solar term is one of the traditional 24 solar terms in China, representing the official start of winter. In this solar term, the temperature drops sharply, and snowflakes begin to fall in succession, which indicates that there will be snow on the ground and nature has entered a cold season.

At the same time, the solar term of heavy snow is also an important time node for farmers to prepare for winter work, such as harvesting surplus crops and preparing to store food. Therefore, the arrival of heavy snow solar terms has an important impact on people's daily life and agricultural production.

Climatic characteristics of heavy snow:

In meteorology, heavy snow is a meteorological term and a weather phenomenon. Its standard is: when it snows, the horizontal visual distance is less than 500 meters; The depth of snow on the ground exceeds 5 cm; The snowfall in 24 hours is 5.0~9.9 mm, and the "heavy snow" in the 24 solar terms is the name of the solar term reflecting the natural rhythm and precipitation.

Different from the concept and standard of heavy snow in meteorology. It's not a weather forecast, it's just a solar term name. During the heavy snow and solar terms, the temperature in the whole country generally dropped. At this time, due to the strong cold air heading south, under normal circumstances, 165438+ 10 is the most frequent month for cold air, and at this time, most parts of China enter winter.

The average temperature in the northeast and northwest regions can reach-10℃, the river is frozen, and the land is covered with snow, which is a northland scenery of "thousands of miles frozen, Wan Li snows". The North China and Yellow River basins are also below 0℃. In the south of China, there are no winter areas, such as Guangzhou and the Pearl River Delta. Although it is drier than before, the vegetation is still lush.