Cold air comes frequently, rain develops in the north and south, and local rainfall in Jiangnan and other places will be extreme in the next three days.

China Weather Network News Right now, there is a cold air affecting northern my country. Today (October 12), it will bring rainfall to many places in North China and Northeast China. However, the rainfall comes and goes in a hurry and will gradually end tomorrow. However, as the cold air continues to move southward and combines with the warm and humid air flow, the southwest region to the middle and lower reaches of the Yangtze River will receive heavy rainfall, and the local rainfall will be extreme. The public needs to bring rain gear when going out to guard against secondary disasters such as landslides and mudslides that may be caused by heavy rainfall.

Affected by the cold air, rainfall occurred in northwest China, Huanghuai and other places yesterday, and large-scale precipitation occurred in Qinghai, Gansu, Shaanxi, Shanxi, Henan and other places. Among them, heavy rain fell in Foping, Shiquan, Ningshan, Changwu, Yijun, Xunyi, Huangling in Shaanxi, Zhengning in Gansu, and Jixian in Shanxi.

As the cold air moves eastward today, rain will also develop in North China, Northeast China and other places. However, the rain comes and goes in a hurry and will gradually weaken and stop tomorrow. From tomorrow to the 15th, as the cold air moves further south and meets the warm and humid air flow from the south, the southwest region to the middle and lower reaches of the Yangtze River will usher in a round of rainfall.

From October 13th to 15th, there was a heavy rainfall process in the eastern part of Southwest China, eastern Jianghan, northern Jiangnan and other places. The heaviest rainfall period was from the night of the 14th to the 15th. There were heavy to heavy rains in parts of southern Chongqing, northern Guizhou, southern Hubei, northern Hunan, northern Jiangxi, southern Anhui and other places. Local heavy rains were of a certain extreme nature. Especially in northern Guizhou and southern Chongqing, the risk of flash floods and geological disasters was higher, so precautions should be taken.

Why is there so much rain in the south this week? At present, the south is controlled by the subtropical high pressure, and the warm and humid air flow has strengthened. When the cold air moves southward, it meets the warm and humid air flow, which will form low-altitude jet streams and low vortex shear in the eastern part of Southwest China, northern Jiangnan, and Jianghan, resulting in frequent rain in the above-mentioned areas.

After this round of processes ends, from the 16th to the 18th, affected by a new round of cold air, there will be a large-scale rainfall process in the areas along and north of the Yangtze River. There will be heavy to heavy rains in North China, Huanghuai, and southern Northeast China. The rainfall intensity is also extreme. The heaviest rainfall will be on October 17. Central and southern Henan, northern Jiangsu and Anhui, eastern and southern Shandong, and southern Liaoning may experience rare heavy rainfall during the same period.

The meteorological department reminded that cold air is coming frequently, and rainfall is developing in many places in the north and south. In the next three days, there will be heavy to heavy rains in many places in the southwest and south of the Yangtze River. The rainfall is of a certain extreme nature, and it is necessary to be alert to the geological disasters that may be caused by heavy rainfall. Around the weekend, affected by a new wave of cold air, areas north of the Yangtze River will also experience rainfall. The intensity of rainfall in many places may be rare during the same period, so we need to pay attention.