After turning over the South Ridge, the cold wave finally put together the last piece of the cooling puzzle at the southernmost tip of the mainland. This afternoon, the southern part of Guangxi and the southern part of Guangdong generally cooled by more than 10, and the temperature dropped by more than 18 in some areas! 
Compared to yesterday's drop of more than 20, it looks a lot "weaker". But you see, these coastal areas of South China are south of the Tropic of Capricorn, and they can be classified as tropical climate regions geographically...This cold wave can be said to have "penetrated" the southernmost tip of China's mainland, and Hainan "escaped", and the cooling was not obvious.
This is almost the end of the journey of this cold wave, after all, beyond that is the stronghold of warm and humid air currents - the vast warm South China Sea.
Generally speaking, in latitude Vietnam, the higher the ground temperature, the cold air all the way south at the same time, but also constantly with the ground heat exchange, if there is no supply of cold air, the cooling ability will become worse and worse, and eventually lose the characteristics of cold air, so "end of life". Even if the strong cold wave traveled all the way to South China, it was still difficult to escape the fate of being "heated" by the ocean and turned into a breeze on the sea.
There are exceptions, though. For example, in early January 2005, a strong cold air in the northern hemisphere moved eastward and southward, affecting China, Japan, South Korea and other countries. After that, it continued to move southward, blowing Indonesia, Malaysia and other countries, and finally crossed the equator, prompting a tropical depression off the coast of Australia to strengthen into a tropical cyclone (equivalent to a typhoon in China), bringing storms to northern Australia and Queensland.
The impact of this cold wave is basically over, but the follow-up cold air will still be affected frequently, resulting in a relatively long process of warming up in various places. Especially in the south, there is still frequent rainy and snowy weather before the end of the month, and the temperature will rise more slowly, thereforeTemperatures will remain below average for much of the southern region and will continue until early March.
Especially before the 25th, the average daily temperature in Huanghuai, Jianghuai, Jianghan, most of Jiangnan, central and northern South China, and the eastern part of southwest China was more than 5 lower than the same period in history, among which the daily average temperature in Jianghan, Jianghuai, central and western Jiangnan, northern South China, and central and eastern Guizhou was more than 7 lower than that in the same period in history, and the feeling of dampness and cold was heavier.
For example, the maximum temperature in Changsha in the coming week will be 5 or below, especially today and tomorrow will be less than 0, and the minimum temperature will fluctuate around 0 in the next week; The maximum temperature in Nanning in the next four or five days is only about 10, and the minimum temperature is less than 10.
Starting on the 28th, the warm and humid airflow will strengthen again, and under its blessing, the temperature in South China will be the first to return to normal or high levels, and the maximum temperature in many places will rise to more than 20, or even more than 25.
The re-strengthening of warm and humid airflow will also bring a new round of rain and snow. In the coming week, precipitation in the south will experience a weakening and then intensifying change.
Tomorrow and the day after tomorrow, the intensity of rain and snow in the central and eastern parts will weaken, but the freezing rain in the south will continue. Among them, from tonight to tomorrow, there will be freezing rain or ice particles in most parts of Hunan, central and eastern Guizhou, central and eastern Hubei, southern Anhui, northeast Guangxi, northwest Jiangxi, and southeast Chongqing.
From the 26th to the 27th, light rain and snow were still common in the south, and from the 28th, as the warm and humid airflow strengthened northward again, the precipitation range will expand again, and the intensity of rain and snow will also increase.
According to the medium-term forecast of the ** Meteorological Observatory: from the 28th to March 1st, there will be cold air affecting the central and eastern regions, and the temperature will drop by 4-6, locally 8-10; There is light to moderate snow or sleet in the eastern part of Northwest China, the western part of North China, Huanghuai, Jianghuai, Jianghan, and the northwest part of Jiangnan; There was light to moderate rain in the eastern and southern parts of Jiangnan, southern China and Guizhou, and heavy rain in some areas.
Overall, the weather in most parts of the north will gradually improve in the next few days, but the south will continue to rain and snow, the temperature will continue to be low, and this state will continue for at least a week in the south, the snow and ice are not easy to melt, and you still need to pay attention to safety when traveling.