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△National precipitation forecast map (Central Meteorological Observatory/Fa)
People's Voice of the World, April 25, Beijing Express In the blink of an eye, the traditional 24 solar terms of "Gu Yu" have arrived. This week's (April 22-28) national weather stage, experts believe that cold and warm air is still active, during which the trough from Lake Baikal to Mongolia will continue to throw out cold air, and at the same time, the warm and moist air flow north of the subtropical high will continue to move north. As a result, it will remain rainy in the south during the week. And under the warm and humid air flow pulse, there are also obvious rainfall and convection processes. The temperature in the north is fluctuating, and it may drop significantly after hitting a new high from the 25th to the 26th. In addition, along with the activity of cold air, there may also be wind-blown sand in the north.
△National precipitation forecast map (Central Meteorological Observatory/Fa)
Experts said that monitoring data showed that from last night (24th) to today (25th), heavy rains occurred in southern Jiangxi, northeast Guangdong, and southern Fujian. Among them, the rainfall in the Pearl River Delta region was less than expected. In general, when there is a strong southwest warm and humid airflow at low altitude, it is easy to create new convection at the tail end of the convection, forming a "backward propagation", after which the new convection replaces the original convection, and then forms a "train effect". The "backward transmission" and "train effect" were not significant, and as a result, the heavy rainfall was generally weaker than expected and in a northeasterly direction.
△National precipitation forecast map (Central Meteorological Observatory/Fa)
According to experts, according to the analysis of the latest meteorological data, from tonight to tomorrow (26th), there will be heavy rainfall in South China, and the falling area will fall southward, corresponding to the warm and humid airflow of the conveyor zone. For this reason, tonight's Central Meteorological Observatory will continue to issue a yellow warning for heavy rain. It is expected that from 20 o'clock on April 25 to 20 o'clock on the 26th, there will be heavy to heavy rain in parts of southern Fujian, eastern Guangxi, Guangdong, and western Taiwan Island, among them, there will be heavy rain (100~200 mm) in some areas of southern coastal Guangdong.
△National precipitation forecast map (Central Meteorological Observatory/Fa)
Industry insiders stressed that it is not difficult to find that in the analysis of the situation, as experts said, by the 27th, the warm and humid airflow will strengthen northward again, and at the same time, there will be a high-altitude trough moving eastward. Moreover, from the 29th to the 30th, the upper-air trough moved eastward, and there was obvious cold air moving southward at the low altitude. Therefore, from the 27th to the 30th, there was a wide range of convective rainfall in the south. At present, on May 1, there was a pause in the rain in the south of the Yangtze River, and the weakening in southern China. After 2 May, the warm and humid airflow will once again push the rainfall from the south to the north, and will intensify again. (Editor-in-charge/Xiangyu)
*Editor's Note:
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