Three characteristics of cold wave

Severe cooling; Strong wind; With rain and snow.

Large cooling range: the cooling range of cold wave is closely related to the intensity of cold air. The stronger the cold air goes south, the greater the cooling rate. This is because the density of cold air is high, which increases the pressure of ground air and causes the temperature to drop rapidly. This rapid cooling will cause freezing damage to crops and affect industrial and agricultural production.

Gale: Cold wave is the activity of strong cold air. When the strong cold air goes south, it will produce obvious pressure gradient with the warm and humid airflow in the south. This pressure gradient will produce a strong pressure gradient force and drive the formation of strong winds. Strong winds will destroy buildings and facilities and affect people's normal life.

Rain and snow weather: when a cold wave strikes, it is often accompanied by rain and snow weather, which is mainly the result of the interaction between warm and humid airflow and large-scale strong cold air activities. When the strong cold air goes south, it will meet the warm and humid air in the south, forming the intersection zone of cold and warm air. At this intersection, warm and humid air will rise rapidly, condense into clouds and produce precipitation. Due to the intensity of cold air, this precipitation often appears in the form of rain or snow. These rainy and snowy weather will adversely affect traffic and communication, and affect people's travel and daily life.