Authoritative forecast: the local snowstorm in the north, wind, rain, snow and dust come together, and the strong cold air mass really comes in March?
Here we are. In March, the second wave of strong cold air appeared again. This wave of cold air also developed for three days, but its influence scope was much larger than that of the first wave, and the coverage of wind, rain and snow was also wider. This is the weather phenomenon of the largest range of temperature change, rain and snow in China since March.
It is true that there are few strong cold air in March, and it will appear in previous years, but it will not be so strong in general, and this is the second wave in March. According to the Climate Center, the next wave of strong cold air will appear around March 26th, so it will develop before the end of March this year.
judging from the climate situation in China in the last five days, most areas in the country have maintained a warm mode, among which only Xinjiang and other places are about 4 degrees lower, while there are still areas in the northeast and south that are 6 degrees higher, so it is really hot. And this wave of cold air is to cool down, and from north to south, there will be the development of cold air in China, so there will also be what everyone calls "cold spring", and the southern region will be the key area. Let's take a look at the specific situation. As can be seen from the weather map, the "cold high pressure" in northern China is very obvious, with two cold air activities of 145 hectopascals, and the airflow of cold air has also entered a large area in northern China.
Therefore, there are also "low pressure" systems in some areas, which are few and far between, mainly creating the basis for the emergence of "rain and snow". Judging from the cooling range of cold air, there will be cooling in southwest, south of the Yangtze River, south China and other places, reaching more than 1 degrees in some areas, while Guizhou and Chongqing are the main affected areas. The cooling intervals in Guangdong, Fujian, Guangxi and other places are a little less, which is the trend of cold air. When it appears on March 19, it will continue to move south. By March 21, although the main cold air activities stopped, the remnants still affected most parts of the south.
The main snowfall on March 19th was distributed in Northeast China and North China, especially in Shanxi, Inner Mongolia, Hebei, Heilongjiang and Jilin, with heavy snow in some areas. At this time, the rainfall is in the southern region, mainly concentrated in Zhejiang, Jiangxi, Guizhou and other regions, and there is heavy rain in some areas.
By March 2th, the intensity of rain and snow will escalate. In the forecast of the Central Meteorological Observatory from 8: on March 2th to 8: on March 21st, we can see that Heijiliao and other places have been completely covered with rain and snow, while the southern part is still the most rainy, which is much smaller than the initial forecast.
March 21st is the end period, and the rain and snow basically disappeared, only in a small area in the northeast, and the rain and snow in the south basically stopped, which is the overall rain and snow situation. Generally speaking, the rain and snow cooled in the central and eastern regions on a large scale from March 19th to 21st, which is the overall situation. Of course, although it rains constantly in the south, there is still no rain in the main rainfall areas, that is, in Yunnan, Guangdong and other large areas, there is still little rain in these two provinces, so it remains to be seen how long it will take to alleviate the rainy Qinghai.
when the cold air is active, the strong wind and cold air mass will once again affect the sandstorm weather in China. According to the Central Meteorological Observatory, it will appear again in six provinces and regions, such as western Inner Mongolia, southeastern Xinjiang and southern Xinjiang basin, northern and eastern Qinghai, north-central Gansu, north-central Ningxia and northwestern Shaanxi. The strongest one is sandstorm in Inner Mongolia and Xinjiang, so just pay attention. It is normal for dust to appear this season, and it would not have been as strong as the last wave.