The cold wave weather in America is mainly caused by polar regions.

The cold wave weather in the United States is mainly caused by the Arctic Ocean from the polar regions. Central North America is low-lying, and the northern United States and northern Canada lack east-west mountains. The polar cold air flow from the Arctic Ocean can travel southward for a long time, bringing strong cooling, strong winds and frosty weather to the central and northern parts of the United States. Sometimes, when the cold wave is strong, it may also affect the Gulf Coast in the southern United States.

Cold wave 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.

Cold wave standard: China's meteorological department stipulates that 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.