On January 24, 2016 (December 15, 2015 in the lunar calendar), sleet occurred in urban Guangzhou for the first time in 67 years. January 24, 2016,"It's snowing in Guangzhou!" Since last night, the circle of friends of Guangzhou citizens has been covered by various snow maps. Some people said that they heard the crackling sound of snow particles hitting the windows all night. The Guangzhou City Meteorological Observatory said that from last night to this morning, what appeared in most areas was rain and graupel, which turned to sleet around noon. This morning's rain and graupel This morning, the lowest temperature in urban Guangzhou recorded a minimum temperature of 1.8¡æ, and it continued to fall "drizzly". However, when I touched it with my hand, I found that it was extremely small ice particles and melted instantly. Although it fell to the ground, it also melted immediately, but it accumulated in the grooves in front of the car roof and the windshield, attracting many citizens to take photos, and some people gathered the ice particles together and rolled them into ice hockey to play. The Guangzhou City Meteorological Observatory stated that most of the small ice grains that appeared in urban Guangzhou from last night to this morning were not snow but graupel. They are small white opaque ice grains that land when water vapor in the sky encounters cold air condensation. They are often spherical or conical in shape and often appear before or during snowing. In some areas, they are called snow seeds and snow grits, which are not "snow" in the true sense of the word. In addition, this is not a "hail". Although both are solid precipitation, they are fundamentally different. Graupel appears in a relatively stable atmosphere, mostly near the rain-snow boundary; Hail is a strong convective weather that often requires a very warm and humid strong updraft and can only occur when the atmosphere is very unstable. However, around noon, the rain turned into sleet. Mr. He, a Guangzhou citizen in his early 20s, said: "The first time I saw snow in my life was actually in Guangzhou." Meteorological data show that small ice grains fell twice in Guangzhou, respectively in Huadu on January 30, 1971 and Conghua on January 22, 1983. The last time it snowed dates back to December 29, 1967. There were sleet in Conghua and Huadu. This is the first time that sleet has occurred in urban Guangzhou since meteorological records began. Extended reading: Where can the snow fall in the southernmost part of China? Hainan Island! Extended reading: Where can the snow fall in the southernmost part of China? Hainan Island! In the past few days, the news that "the BOSS level cold wave is coming and it will snow in many places in the south" has exploded in the circle of friends. It is said that even Guangdong and Guangxi may snow. What? Can the snow fall so far south? The Data Emperor was so scared that he quickly ate an ice cream to calm his nerves. He suddenly became more clear-headed and determined to dig through history and see where the southernmost snowflakes in my country could drift. Snowflakes have snowed in Nanning, Guangzhou, and people who have seen snow have become Uncle Cheng. As a true northern man, the impression of snowy days is that southerners who play with snow are more fun than snow. This place is by no means showing a sense of superiority. It is really not easy to say that snow in the south, and it takes "hardships" to snow in South China. Many friends in Guangdong and Guangxi have never seen a snowy day. However, according to more than 60 years of data since complete meteorological records were available (since 1951), snow has fallen in many places in Fujian, Guangdong and Guangxi. In order to understand at a glance where the southernmost snowflakes can float to, two southernmost snowflake maps have been made here. Why two? In the 1980s, my country's climate took a turn, and the probability of a warm winter increased significantly. However, in the decades before the 1980s, the climate was relatively cold, and the position of the snow line also changed accordingly. The two maps record the southernmost snow line in my country from 1951 to 1980 and 1981 to 2015 respectively: during the thirty years from 1951 to 1980, Longzhou-Nanning-Laibin-Guiping-Wuzhou-Luoding-Gaoyao-Guangzhou-Heyuan-Wuhua-Shantou This line has become the southernmost snow line in my country, probably in the south-by-middle of South China; In the more than 30 years after 1981, the climate turned warmer, and there were no snowfall records in Luoding, Gaoyao, Guangzhou, Zengcheng and Shantou in Guangdong. Therefore, the southernmost snow line is relatively northerly, and it shrank northward than in the previous 30 years. About 100 kilometers. Although snowfall has occurred in many places in Guangdong and Guangxi, it has been decades since. For example, the most recent snowfall in Nanning occurred in 1983; Guangzhou occurred earlier, in 1967, and this was the only snowfall in Guangzhou since meteorological records were recorded; the snowfall in Shantou was also "grandfather" level, in 1958! It is said that when he was a child, those who had seen snow in Nanning were already around 40, those who had seen snow in Guangzhou were Uncle Cheng, and those who had seen snow in Shantou were telling his descendants about snow. The south of the southernmost snow line is the "restricted area" for snowfall. In coastal areas of Guangxi and Guangdong, such as Qinzhou, Beihai, Yulin in Guangxi, Zhanjiang, Shenzhen, Dongguan and Shanwei in Guangdong, there has been no snowfall since 1951. During the Ming and Qing Dynasties, even Hainan had snow for more than 60 years when there were accurate meteorological records. The southernmost snow line in my country was in central South China. What about in ancient times? Where can the snow fall in the southernmost? Although there are no meteorological records, snowfall is still a world-breaking news for South China. Many local chronicles record abnormal weather phenomena. After the founding of the People's Republic of China, my country also had relevant research results on ancient climate conditions. According to records, although there were several changes in cold and warm during the Qin and Han Dynasties, Wei, Jin, Southern and Southern Dynasties, and Sui and Tang Dynasties, the overall period was relatively warm. There are few records of snowfall in southern my country. More extreme snowfall events mainly occurred in Hubei, Jiangsu and Zhejiang, etc., so the southernmost snow line at that time should be near Nanling. By the end of the Northern Song Dynasty, the climate turned colder, and records of snow also appeared in the Lingnan area. Around the 1110s, the "Guihai Yu Hengzhi Magazine" recorded snowfall in Guilin, Guangxi. The local people "did not know what the snow looked like", which shows that snowfall was rare. During the Chunxi period of the early Southern Song Dynasty, which was contemporaneous with the end of the Northern Song Dynasty, Fuzhou lychee withered due to heavy snow and severe cold. There are also records that "the snow in Jianning Prefecture was several feet deep"(Jianning Prefecture is located in northern Fujian). The Little Ice Age is recognized to have occurred from the 16th to the 19th century and lasted for about 400 years, probably corresponding to the Ming and Qing Dynasties. In this relatively cold climate period, the number of snow, frost and freezing disasters in my country's tropical areas has increased significantly. From the climate records in local chronicles and relevant historical records, it is found that there were several snowfalls in South China during the Little Ice Age. Counting the places where snowfalls occurred, we also obtained the southernmost snow line of my country during the Ming and Qing Dynasties. During the Ming and Qing Dynasties, the southernmost snow line in my country was significantly southernmost than in modern times. Qiongshan in Hainan had snowfall during the Wanli period of the Ming Dynasty and the Kangxi and Guangxu periods of the Qing Dynasty. Oh, my God, ancient snow can invade Hainan Island! The most recent record of snowfall in Guangdong, Guangxi and Hainan was during the Guangxu period of the Qing Dynasty. In the years around 1893, snowfall occurred in coastal areas of Guangdong, Guangxi and Qiongshan in Hainan. It has been more than 120 years.