What changes have taken place in the national temperature during the two festivals?

During the Mid-Autumn Festival on 20 17, the temperature in most parts of the country was suitable, and no typhoon landed in China. Meteorological conditions are generally good, suitable for outdoor activities. However, in the early holiday period, there are strong rainfall processes in the eastern Sichuan Basin, Hanshui River Basin, southern Huanghuai, Jianghuai and other places, so it is necessary to pay attention to traffic safety and prevent the adverse effects caused by secondary disasters such as landslides and mudslides caused by heavy rainfall. The specific forecast is as follows:

1. There are two cold air activities in the northern region. 1 ~ 2, there will be rainy weather in the eastern part of northwest China, north China and northeast China, moderate rain in some parts of northeast China, sleet or snow in northeast Inner Mongolia and northwest Heilongjiang; Most of the above areas are accompanied by northerly winds of 4 ~ 6, and the temperature drops by 4 ~ 8℃. The temperature drop in eastern Inner Mongolia, Heilongjiang, Jilin and other places can reach 10 ~ 12℃. From 6th to 8th, affected by another cold air, there will be a rain cooling process from west to east in the northern region.

2. There is more rainfall from the east of Sichuan Basin to Huanghuai and Jianghuai. 1 ~ 2, there will be heavy rain in southern Shanxi, northeastern Sichuan, northern Chongqing, Hubei, southern Henan, central and northern Anhui, Jiangsu, Shanghai and other places. There will be heavy rain accompanied by short-term heavy precipitation, lightning and other strong convective weather, and the cumulative rainfall can reach 80 ~ 120 mm; From 3 to 5, there will be a moderate to heavy rain in the above areas.

3. Most of the south of the Yangtze River and north-central South China are mainly sunny or cloudy. The daily maximum temperature is between 28℃ and 34℃, and high temperature weather of 35℃ and 36℃ may occur in some areas in the south-central part of the south of the Yangtze River at 1 ~ 2.

4. Staged smog appeared in Huanghuai, North China. On the morning of 5-7, there will be mild haze in central and southern North China, Huanghuai and other places, and moderate haze in the local area; At night, there may be fog in the south of North China, and the minimum visibility is about 500 meters. In addition, on the morning of the 6th to 7th, some areas in the northern part of the south of the Yangtze River were foggy.