What's the rainy season like in Changsha?

The rainy season in Changsha refers to the period from the middle and late June to the first half of July every year. Because plum rains occurred in the mature period of plums in the south of the Yangtze River, people in China call this climate phenomenon "plum rains", and this period is also called "plum rains season".

In the past few days, the sky has been gloomy and the precipitation has been constant, sometimes big and sometimes small. Therefore, there is a popular proverb in southern China: "Rain hits plum blossoms, and there is no sun for forty-five days". Continuous rain, high temperature and high humidity are the main characteristics of plum rain.

The start date of plum rains every year is called "entering plum" or "main plum", and the end date is called "leaving plum" or "breaking plum". The time of entering and leaving plum varies with the climate. In the middle and lower reaches of the Yangtze River in China, in the 1950s, the average plum blossom date was June 10, July 12, and the plum rain period was 33 days. After the 1960s, the average plum blossom date was June 17, July 6-7, and the plum rain period was about 20 days. Compared with the 1950s, the plum blossoms in the 1960s bloomed late and early, and the plum rains were short.

1, Mei Feng: The year with rainy days and heavy precipitation is called "Mei Feng". In the rainy season, the precipitation can sometimes reach more than 400 mm, accounting for 1/3 ~ 1/2 of the total annual precipitation. 1954 The meiyu period in the middle and lower reaches of the Yangtze River lasted for two months from the beginning of June to the beginning of August, and the precipitation reached about 1000 mm, causing a once-in-a-century flood in the Jianghuai basin.

2. "Dead plum" or "dried plum": The date of precipitation and the year with little precipitation are called "dead plum" or "dried plum".

3. "Empty plum": In a few years, the rain belt quickly jumped over the Yangtze River and Huaihe River from South China and entered the Yellow River Basin. There is no plum rain in the middle and lower reaches of the Yangtze River, or only a few days of precipitation, and the precipitation is very small. This year is called "Empty Plum".