The difference between graupel, hail and snow. Will it snow in Guangzhou? Is there a precedent in history?

Hail is also called "hail", commonly known as hail, and some areas are called "Lengzi" (such as Xuzhou), which is the most common in summer or at the turn of spring and summer. It is some ice particles as small as mung beans and soybeans and as big as chestnuts and eggs. The water on the local surface is vaporized by the sun and then rises into the air. A lot of water vapor condenses into clouds, and after being liquefied by cold air, the dust in the air is used as the condensation core to form raindrops, and the raindrops are getting bigger and bigger. If there are more clouds, it will rain. If exposed to cold air without condensation nuclei, water vapor will condense into ice or snow, which is snow. If the temperature drops sharply, it will form a bigger ice mass, which is hail.

Yukiko, the "graupel" in meteorology. Small white opaque ice particles, usually spherical or conical, fall after water vapor in the air condenses with cold air, usually before or during snow. So the most obvious difference is that hail is big and yukiko is small.

Snow is a solid precipitate formed by condensation of water vapor in the sky, and snowflakes have regular geometric shapes. Colupole is surrounded by a large number of frozen frozen ice bodies and accumulated around the snow crystal, covering up the solid precipitation of the original shape of the snow crystal.

According to Nanhai County (Nanhai County is located in Guangzhou), there have been 13 snowfalls since the Song Dynasty, with an average snowfall of more than 50 years and the latest snowfall of 1929. Please look at the snow situation recorded in detail in Nanhai County Records several times:

In December of the fifth year of the Song Dynasty (1early 246), it snowed for three days and accumulated more than a foot, but the Japanese side did not.

In the 13th year of Yongle in Ming Dynasty (14 15), plum blossoms died in winter snow.

In the third year of Qin Long in the Ming Dynasty (1569), it snowed heavily in Xiqiao Mountain in December, and all the trees were frozen, which was solved the next day.

In the 22nd year of Emperor Kangxi of Qing Dynasty (1683), all the trees died in winter due to heavy snow and frost.

In the fifteenth year of Qing Daoguang (1835), there was heavy snow all over the sky on December 22nd, covering more than four inches.

In the third year of Guangxu reign in Qing Dynasty (1877),10/29th of the month, wind, rain, thunder, snow and hail came together, and many fish froze to death.

On November 17th and 18th (beginning with 1893) in the 18th year of Guangxu reign in Qing Dynasty, there was a heavy snow, and there was more than one inch of snow on the ground.

Since the winter of 18 (1929) in the Republic of China, the weather has been unusually warm and it hasn't rained for a long time. It began to rain lightly on the 27th, and the north wind blew hard in the early morning of the 29th, and it turned to light snow at dawn. It was rather cold after dawn. It was still snowing on the morning of the 30th, and it was even colder in the afternoon. Plum blossoms and red chrysanthemums in Central Park (in Guangzhou, when Nanhai County was stationed in Guangzhou) were covered with snow flies, all bright white. 3 1 in the morning, the snow is still falling, and the degree of cold is particularly fierce. Cha is the morning of Panfu Road, where a 20-year-old beggar was found dead on the ice.

Since the Republic of China, the chronicles of Guangzhou and counties have been written in different times and have been interrupted. For example, the lower limit of Guangzhou County Chronicle was not uniform after the interruption of 100 years. For the time being, everything you see in local chronicles is recorded, not excluding snow and lack of records. Based on the snowfall records in Guangzhou since the Republic of China, it needs to be verified in a special article. (For example, according to meteorological historical records, the last time it snowed in Guangzhou was on February 29th, 1967, in Huadu and Conghua, a suburb of Guangzhou. )