On the afternoon of January 2, although Nanjing and other places in China's Yangtze River Delta are still warm and sunny, the amount of clouds in the sky has begun to increase, and the photos taken by netizens show that the clouds over Nanjing in Jiangnan are stacked like the wind blowing on the water surface, and they are unfolded like fish scales, forming a rather interesting picture under the blue sky and sunlight. This also made some netizens ask: Is this a precursor to weather changes?
Judging from the high-definition visible light satellite cloud map on the afternoon of January 2, most of the middle and lower reaches of the Yangtze River in China today are still dominated by clear sky areas, corresponding to the sunlight on the ground. However, compared with before, this afternoon in many parts of Anhui, Jiangsu and Zhejiang in the Yangtze River Delta, there was a feather-like cloud sweeping through, which corresponded to the "fish scale cloud" seen in Nanjing and other places on the ground.
However, from the larger range of Fengyun No. 4 high-definition visible light satellite cloud map, the cold cloud range in the central and eastern parts of China today is relatively small, most of which are concentrated in the southwest line, and most areas have seen warm and calm sunshine. But the cold clouds in the west mean that in the south, where the weather is still calm in most areas, the water vapor has not completely withdrawn. As the clouds in the sky in the Yangtze River Delta and other places increased, water vapor showed signs of being active again.
The forecast of the Central Meteorological Observatory believes that as warm and humid water vapor begins to strengthen, the rain and snow weather east of China's Qinghai-Tibet Plateau will begin to increase - especially on the evening of January 3, there will be a significant expansion and strengthening of the trend, in the forecast, it has been pointed out that from the evening of January 3 to January 4, a large range of rain and snow weather east of China's Qinghai-Tibet Plateau from Chongqing, Sichuan, Guizhou, Shaanxi to Hunan, Hubei, Henan, Anhui and other places, and snowfall may occur in some areas.
The rain and snow will be further expanded and strengthened from January 4 to January 5, and there will be obvious rain and snow areas in the middle and lower reaches of the Yellow River in Shaanxi, Shanxi, Henan, shandong, and south of the Yellow River, a large range of moderate to heavy rain belts will appear in Hunan Hubei, Hubei, Anhui, Jiangsu, Shanghai, Zhejiang, which is the first large-scale rain and snow since the New Year, and it is also another large-scale rain and snow after the final cold wave in late December.
However, compared with the rain and snow of the final cold wave, this large-scale rain and snow is made of warm and wet water vapor - the supercomputer's prediction believes that around January 5, the low and medium altitudes in many places south of the Yellow River in China will blow a strong southerly wind, which is a sign of the strong return of warm and humid water vapor. However, there are too many warm and humid air currents in the north, and a wide range of rain and snow will follow. Of course, because there is no cold wave catalysis, the rain and snow produced by these warm and humid water vapors, the snow line is basically maintained in the north of the Qinling-Huai River, and there is less snow in the south.