寒潮
cold wave

1月6日，北京迎来新年的第一个寒潮。下班时间段，天气软件显示气温零下17度，体感温度却是零下31度。

The first cold wave in 2021 features a "dramatic temperature drop," "significant wind-chill effect" and "prolonged period of low temperature," said Lei Lei, chief forecaster of the Beijing meteorological station.
北京市气象台首席预报员雷蕾表示，2021年第一个寒潮的特点是降温幅度大、风寒效应强、低温持续时间长。