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。

 

人们通常用cold snap、cold wave、cold front、cold spell来表达寒潮。寒潮是指strong cold air（强冷空气）由亚洲大陆西部或西北部侵袭中国时的强降温天气过程，一般多发生在秋末、冬季、初春时节。

 

当范围很大的cold air mass（冷气团）聚集到一定程度，就会大规模向南入侵，形成寒潮天气。寒潮地面高压的前端一般都有一条cold front（冷锋）。寒潮过后，当地会受low pressure area（低气压）控制。

 

根据北京市气象台监测，截至1月6日18时55分，北京南郊观象台的气温为-17.3℃，低于2010年的-16.7℃，创近20年来新低（a record low in 20 years）。

 

China's meteorological authority on Thursday renewed a blue alert for a cold wave, as most parts of northern and southern China will see drastic temperature drops and strong gales¹.

中央气象台1月7日继续发布寒潮蓝色预警，华北及华南大部分地区都将迎来强降温和大风天气。

 

From Thursday to Friday, some areas in the provinces of Shanxi, Shandong, Jiangsu, Jiangxi, Zhejiang, Fujian, as well as Shanghai, will experience temperature drops of up to 10 degrees Celsius², said the National Meteorological Center (NMC).

1月7日至8日，山西、山东、江苏、江西、浙江、福建以及上海部分地区降温可达10摄氏度。

 

The cold wave will bring strong gales to areas along the Yangtze River and north of the river, according to the NMC.

受寒潮影响，长江流域及其以北地区将有大风。

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