The weekend just passed (May 25-26), when a large-scale heavy rainfall process hit the south, Hunan, Anhui and other places were hit by heavy rain. At present, the heavy rainfall is still continuing, and the area of heavy rain to heavy rain in Jiangnan, South China and other places is still large, and it is expected to end tomorrow. However, one wave is not even and another wave is rising. From the day after tomorrow, most of South China will usher in a new round of rainfall process. Southwest, South China and other places need to be alert to the continuous rainfall to cause disasters.

Hunan, Anhui and other places are encountering heavy rain, which will continue today and tomorrow

During the two days of the weekend, the south suffered heavy rainfall. The rainfall gradually developed from west to east on Saturday night, and reached its peak yesterday. According to the monitoring of the Central Meteorological Observatory, from yesterday to this morning, heavy rain occurred in Suzhou, Jiangsu, Huzhou, Zhejiang, southwest Guizhou, south Anhui, north central Hunan, southwest Jiangxi, and Loudi, Hunan, and Shaoyang; A heavy rainfall of 118.7 mm occurred in Hefei, Anhui Province in one hour. Such rainfall was distributed on the scale of heavy rainstorm within 24 hours, which led to serious ponding in many local roads.

"This round of rainfall process in South China is characterized by a wide range of influence, more rainstorms at a single point and strong convection." Zhang Juan, a meteorological analyst at China Weather Network, said that today, there are still large-scale rainfall in Jiangnan, South China and other places. The area from rainstorm to heavy rainstorm is larger, and many places will also have strong convection weather when rainfall occurs. Tomorrow, the rainfall in the south will weaken the pressure from the south, and the heavy rainfall is mainly concentrated in the southern coastal areas of South China.

Rainfall forecast chart from May 27 to 28

Judging from the rainfall process, today, moderate to heavy rain will generally occur in eastern Jiangnan, southern China and other places. Some areas in northeastern Jiangxi, southern Zhejiang, northwestern Fujian, central Guangxi, central and southern Guangdong and other places will experience heavy rain or heavy rain. The rainfall in these areas will also be accompanied by severe convective weather, including southern Anhui, southern Jiangxi, northern Zhejiang, southeastern Yunnan The northeast and west of Guangxi and the central part of Guangdong should pay attention to preventing thunderstorms, strong winds or hail.

Tomorrow, some areas in the southeast coast of Guangxi, southwest of Guangdong and other places will have heavy rain or rainstorm, and some places in southern Guangxi, Guangdong, Fujian, eastern Yunnan, southern Guizhou and other places may have short-term heavy rainfall, thunderstorms and strong winds and other severe convective weather.

Why is the recent heavy rain in the south? Zhang Juan explained that the dynamic and moisture conditions of recent rainfall are very favorable. Due to the eastward movement of the southwest vortex at the lower level and the influence of the plateau trough, the dynamic conditions of precipitation are sufficient; The warm and humid air flow in the southwest is strong, and the strong cyclone storm "Remar" in the Bay of Bengal drives the water vapor like a pump, which leads to the continuous water vapor being transported to South China and other places.

Two rounds of rainfall seamless connection Guizhou, Guangxi, Guangdong and other places need to be alert to continuous rainfall causing disasters

This round of rainfall in South China will weaken tomorrow, and the scope will be reduced to the coastal areas of South China, followed by a new round of rainfall process development. From May 29 to June 1, moderate to heavy rain will occur in the eastern part of southwest China, South China, Jiangnan, Jianghan and other places, with heavy rain in some areas, local heavy rain.

Rainfall Forecast Chart from May 29 to June 1

Zhang Juan introduced that, compared with the previous round, the new round of rainfall lasted longer. It rained almost every day in parts of southwest and southern China this week, and the heavy rainfall areas in Sichuan, Guizhou, Guangxi, Guangdong, Jiangxi and other places had a high overlap with the previous period, so we should be alert to the continuous rainfall causing disasters.

The warm tip of the China Weather Network is that this week, most of the rain in the south, rain almost every day in many places, Sichuan, Hunan, Guangxi, Guangdong and other bureaus need to pay attention to prevent geological disasters, mountain torrents, floods in small and medium-sized rivers, urban and rural waterlogging and other secondary disasters that may be caused by continuous rainfall. It is recommended that the public pay attention to the near forecast and early warning information, and try to reduce going out when heavy rainfall occurs. (Planning/Du Bingbing Data Support/Zhang Juan)