Much like the situation some time ago, February 10 was still a cold day in many parts of the mainland. For example, from the Fengyun No. 4 high-definition visible light satellite cloud map, many places in the south east of the Qinghai-Tibet Plateau on the mainland are still immersed in a wide range of cold clouds, which is still a lot of water vapor on the mainland, and the cold air residue in many places continues to be entangled with water vapor, creating a large range of clouds lingering, so that the feeling of wetness and cold in many places will not go away for a long time.
Since the end of January, the water vapor in the central and eastern parts of the mainland has been extremely active, resulting in continuous rain and snow in many places, and many places have generally been in a state of excessive precipitation, and the provincial capitals of Changsha and Hangzhou have broken through the precipitation extremes of the same period in history. From the prediction of the existing supercomputer, while the water vapor continues to strengthen, the situation in the mid-latitude westerly wind belt further evolves - the water vapor not only haunts many places in the south, but also begins to have a trend of spreading northward, and will eventually encounter cold air that winds around the south of the Bohai Sea, forming a classic reflux situation.
In winter, because of the lack of water vapor in north China and other places in the north of the mainland, snowflakes have not been a regular visitor in this period, but in the situation of return, marine water vapor has the ability to drill into north China, and eventually snowfall occurs under the catalysis of cold air that is cold enough. Compared with the snow in the south, because there is less water vapor, there will be basically no large-scale heavy snowfall, but because the temperature is very low, the snow will be more efficient - the forecast of the Central Meteorological Observatory pointed out that from February 12, when the large-scale rainfall in the south of the mainland starts, the snowfall in Inner Mongolia, Beijing, Tianjin, Hebei and Shanxi will also spread rapidly, and many places will be dominated by small to medium snow.
And then from February 12 to February 13, the Beijing-Tianjin-Hebei line may also appear moderate to heavy snow, the Central Meteorological Observatory believes that the local even up to the level of blizzard, from the snowfall range forecast, this snowfall will be a pure northern snowfall, concentrated in the north of Inner Mongolia Shanxi, Beijing, Tianjin, Hebei, Liaoning and Other provinces, the south can snow in the few places, before a lot of snow in the middle and lower reaches of the Yangtze River, most provinces, autonomous regions and cities will be based on rainfall.
And according to the existing forecasts, this backflow situation can continue for several days, and the snow in many parts of the north can still rain for 2-3 days, such as Haidian in Beijing, and the official forecast has pointed out three days of snow from February 12 to February 15.