When did cold air begin to affect the northern region?

Since September 29, cold air has affected the northern region, and the local cooling rate has reached 10℃

According to the website of the Central Meteorological Observatory, the Meteorological Observatory predicts that there will be obvious cooling and windy weather in northern China from September 29 to June 2 10 due to the influence of a strong cold air. The average or minimum temperature in northern Xinjiang, northern Gansu, most of Inner Mongolia, north-central North China and most of Northeast China will drop by 4 ~ 8℃, and the cooling range in some areas can reach 10℃.

On September 28th, the rainfall in South China was weak, with heavy rain or rainstorm only in parts of northwestern Jiangxi, eastern Fujian, western Guangdong and Hainan Island. The local rainfall in Sanya, Hainan is 1 13mm.

The Central Meteorological Observatory predicts that there will be obvious cooling and windy weather in northern China from September 29th to June 2nd 10 due to the influence of a strong cold air.

The average or minimum temperature in northern Xinjiang, northern Gansu, most of Inner Mongolia, north-central North China and most of Northeast China will drop by 4 ~ 8℃, and the cooling range in some areas can reach 10℃. Most areas in the north are accompanied by northerly winds of 4 ~ 6.

The Central Meteorological Observatory predicts that from September 30 to June 2 10, due to the combined influence of low-level jet and shear line, there will be heavy rain and local heavy rain in parts of northeast Sichuan Basin, Jianghan, south-central Huanghuai and Jianghuai.

In addition, in the coming week, there will be more cold air activities, and the atmospheric diffusion conditions in most parts of the country are good, and there is no obvious haze weather. However,1from the morning of October 5 to 7 10, the atmospheric diffusion conditions in parts of central and southern Beijing, Tianjin and Hebei deteriorated, with mild haze and local moderate haze. On June+10/October 1 day, 65438, a sandstorm occurred in the southern part of South Xinjiang Basin.