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△National precipitation forecast map (Central Meteorological Observatory/Fa)
People's Voice of the World, April 17, Beijing Express In the blink of an eye, the "Qingming" of the traditional 24 solar terms has arrived. In the opinion of experts, as the warm and humid airflow moves northward in waves, when it encounters cold air from the south, it will cause frequent rainfall in the south. In the northern region, there will also be a large-scale rainfall process from west to east from the 18th to the 20th. Whether it is in the north or south, the temperature mostly shows a trend of high and then low.
△National precipitation forecast map (Central Meteorological Observatory/Fa)
Experts said that monitoring data showed that from last night (16th) to today (17th), under the convergence of cold and warm air, there was a wide range of rain in Jiangnan and northern South China. According to the analysis of the latest meteorological data, the game of cold and warm air will continue in the future, among them, from the day of the 18th to the 19th, the warm and humid airflow will first go north, and then the cold air will go south on the 20th, and then from the 21st to the 23rd, the cold and warm air will confront each other in the south, and then form two rounds of heavy rainfall and strong convection process, and at the same time, there will be a precipitation process from west to east in the north from the 18th to the 20th.
△National precipitation forecast map (Central Meteorological Observatory/Fa)
According to experts, during the precipitation process from 18 to 20 July, both the south and the north had high-altitude troughs and low vortices moving eastward; however, after the northern vortex moved eastward from the vicinity of Ningxia, it will gradually weaken; therefore, the rainfall in the north will become weaker and weaker the further it goes eastward; at present, it is basically gone over the Taihang Mountain. The southern vortex system, which develops from the border area of Sichuan, Guizhou and Chongqing, will move northeast and continue to strengthen, and there will be cyclones on the ground, so the rainfall will also strengthen and expand northward to Hubei and Anhui on the 19th.
△National precipitation forecast map (Central Meteorological Observatory/Fa)
It is worth noting that industry insiders emphasized that it is not difficult to find that the situation is also not difficult to find, as experts said, after the 20th, the high-altitude trough moved eastward out of the sea, and the cold air behind the trough moved southward, making the rain belt move east to south. From the 21st to the 22nd, the confrontation of cold and warm air formed a low-level shear line in eastern Guangxi, Guangdong, southern Hunan, southern Jiangxi, Fujian, and Zhejiang, resulting in significant rainfall in the above areas. From the 23rd to the 24th, the cold air continued to press southward, pushing the rain band out of the sea gradually. As a result, the rainfall in the south has temporarily weakened. (Editor-in-charge/Xiangyu)
*Editor's Note:
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