What is cold wave weather?

Cold wave weather refers to a weather phenomenon that the cold wave passing through this area will cause a sharp drop in temperature, accompanied by strong winds and precipitation. According to the cold wave standard of the Central Meteorological Observatory, the intensity of cold wave activity is defined by process cooling (the beginning and end of cold air influence, the difference between daily average maximum temperature and minimum temperature) and negative temperature anomaly.

Cold wave weather, also known as cold current, is one of the main weather phenomena in winter. Generally speaking, cold wave weather refers to a high pressure generated in the north, and the cold high pressure invades the south along the northwest airflow behind the westerly trough and finally changes to the sea. During the cold wave, cold air causes the local temperature to drop sharply, and the ground pressure to rise sharply, sometimes causing strong winds and waves. Cold wave weather has the widest influence range among all bad weather, and it can affect about 6.5438+million square kilometers in winter, but neither tropical cyclone nor temperate cyclone can reach such a huge influence range.

Cold wave weather is a kind of disastrous weather in winter, and people are used to calling it cold wave. The so-called cold wave refers to the cold air from high latitudes, which rapidly strengthens under certain weather conditions and invades the middle and low latitudes, causing severe cooling, strong winds and rainy and snowy weather along the way. When this cold air reaches a certain standard, it is called a cold wave.

According to the regulations of China's meteorological department, if the temperature drop caused by cold air intrusion reaches more than 10 degrees Celsius and the lowest temperature is below 5 degrees Celsius in one day, it is called a cold wave process.