The weather symbol of the cold wave is

The cold wave weather process is a large-scale strong cold air activity process. Its weather is mainly characterized by severe cooling and strong winds, sometimes accompanied by rain, snow, snow or frost.

cold wave weather is a large-scale severe cooling phenomenon under the specific circulation situation at high latitude in winter half a year. Where cold air passes, there will be cooling, strong wind, rain, snow or freezing weather one after another, which will affect a wide range. Heavy snow, freezing, rain, etc. caused traffic jams and telecommunications interruptions; Strong winds in coastal areas cause storm surges and capsizing accidents at sea; Strong cooling has the most serious freezing damage to crops, melons and tropical crops. Cold wave has a great influence on industrial and agricultural production and people's daily life. It is a disastrous weather.

Cold wave standard:

Cold wave standard of Central Meteorological Observatory: The intensity of cold air activity is defined by the combination of process cooling and negative temperature anomaly. (Process cooling refers to the difference between the highest and lowest daily average temperature; Negative temperature anomaly refers to the difference between the lowest daily average temperature and the average temperature of the ten-year period in which the day is located.

the cold wave is divided into four grades: regional cold wave, national cold wave, strong cold air and general cold air.