What are the characteristics of cold wave?

Cold wave weather refers to the phenomenon of severe cooling, strong wind and precipitation caused by cold current passing through this area. The winter half year is characterized by strong winds and cooling. There is a strong wind behind the cold front, and the general wind speed at sea can reach 5-7 and 6-8. The duration is mostly 1-2 days. In China, there is a northwest wind in the north, a north wind in the middle and a northeast wind in the south.

In arid northwest and north China, sandstorms often form. The temperature dropped sharply after Qianfeng crossed the border, lasting 1 day to several days. Northwest China and North China have more cooling, while Central China and South China have less cooling due to the weakening of cold air. Cooling will lead to frost and freezing. Precipitation mainly occurs near the cold front, with less precipitation in the north of Huaihe River and occasional snowfall, and more precipitation in the south of Huaihe River, especially when the cold front is slow or quasi-stationary, which can produce large-scale precipitation for a long time. In spring and autumn, in addition to strong winds and cooling, there are sand blowing and sandstorms in the north in cold wave weather, and there are more opportunities for precipitation than in winter.

The outbreak of cold wave has different characteristics in different geographical environments. In the northwest desert and loess plateau, it is characterized by less wind and snow, which is easy to cause sandstorm weather. In Inner Mongolia grassland, it is windy, snowy and cold. In North China and Huanghuai areas, cold waves are often accompanied by snow and snow. In the northeast, it shows more violent winds and heavy snow, and the snowfall is the highest in the country. Jiangnan is often accompanied by freezing rain.

Prevention of cold wave weather

1. When the temperature drops suddenly, pay attention to add clothes to keep warm, especially the hands and face.

2. Close the doors and windows and fix the outdoor structure.

Be careful when you go out.

4. The old, the weak, the sick and the disabled, especially those who are sensitive to temperature changes such as cardiovascular patients and asthma patients, should try not to go out. 5. Pay attention to rest and don't be too tired.

5. Beware of gas poisoning, especially for families that use coal stoves for heating.

6, should strengthen the weather forecast, release accurate cold wave news or alarm in advance.