The second wave of rain and snow in the central and eastern regions has a wider range. Can it snow in Huanghuai, North China this time?

From June165438+1October 17 to June 19, the first round of large-scale rain and snow weather in China has ended since winter, among which, under the influence of warm and humid airflow, northeast cyclone and other factors, there has been a wide range and strong rain and snow weather, from heavy snow to heavy snow in Heilongjiang and Inner Mongolia.

Heavy rain or torrential rain is mainly concentrated in Liaoning, Shandong, Hebei, Chongqing and other parts of the country, and in the same period of history, such climate change is very rare, so many people are surprised. Of course, this round of weather has little impact on the southern region. The main influence is that in the northern region, under the influence of warm current, some areas in the south even have high temperatures above 30 degrees. This is the general climate of this round.

After this round of rain and snow weather, the second wave of rain and snow cooling weather came again. It is expected that there will be a large-scale rain and snow cooling weather again in the central and eastern regions from the 20th to the 22nd. This round of snowfall has a wider coverage and a wider range of rain and snow. There may be small to medium snow or sleet in the northwest, western Sichuan Plateau, North China, Huanghuai and Northeast China, with heavy snow or blizzard in Qinghai, Gansu and Hebei. It can be seen from the new snowfall distribution map that there is obvious snowfall in most parts of the north. Even in many desert areas in Xinjiang, there may be snowfall, but the intensity will not be too great, so the snowfall range is very wide and obvious.

At the same time, there is more snowfall in the south, even in Guangdong, Fujian and other places, the weather will change to a certain extent, but Yunnan will be the region with strong changes in rain and snow weather, which is basically white, and snowfall and rainfall are basically perfectly avoided. It's really "four seasons are like spring", and everyone's hot and cold weather changes, and the region changes little. Of course, the surrounding area has been cooling down, but in a few cases it will still spread to Yunnan, but it has not completely cooled down, so this is different. With the enhancement of cold air, the temperature drop in parts of the south of the Yangtze River and northern South China can reach 14℃, which is a big cooling weather. At the same time, the lowest temperature line of 0℃ will be pushed to the south-central part of Huanghuai on the 23rd or 24th, with great cooling intensity.

This is the second wave of rain and snow. Many people may say, has La Nina broken out in an all-round way this year? Since the beginning of the first round of rain and snow in winter, climate change has occurred continuously, and the intensity of the second wave of cooling in many areas is greater. Let's take a look at the development of La Nina phenomenon.

It is true that the main monitoring index area of La Nina phenomenon is still fluctuating. Compared with the previous period, it has rebounded and is now declining. Of course, it has not crossed the scale line of-1 degree, so it is still developing strongly and continuing. Judging from this trend, La Nina can basically enter winter (meteorological winter, 65438+February to February of the following year).

Therefore, when it develops in winter, its impact on China's climate will be obvious. Generally speaking, after La Ni? a phenomenon appears, the temperature in winter in China will be cold, which is prone to cold winter. So many people think that this is the beginning of the "cold winter", but under the existing circumstances, the weather is really getting cold, but La Nina phenomenon is not the main factor of weather change in China, but only a part of it. Under the changes since the day before yesterday, there are still many climatic phenomena in China, such as melting ice and the influence of the Bay of Bengal monsoon, which is a comprehensive factor change.

So generally speaking, there is no way to say that La Nina phenomenon must be related to this climate change, and there are more climate factors. It can only be said that there may be some relationship, but judging from the seasonal changes, there is no problem.