A powerful sandstorm hit a province in northwestern China, causing low visibility.

Video filmed in the city of Zhangye in Gansu Province on March 20 shows a wall of sand about to engulf the city.

Another video filmed in the city of Jiuquan shows farmers trying to prevent a greenhouse from being blown away by the strong winds and police officers moved a broken light pole to the side of a road.

Cars were seen driving along a road with extremely low visibility.

According to reports, the speed of the wind reached 46.6mph to 54.7mph and the visibility was less than 200 metres.

The video was provided by local media with permission.

3月20日，甘肃张掖、敦煌等地出现入春以来最强大风沙尘天气，局部地区阵风风力已达9级，能见度小于200米。大风裹着细沙形成沙墙缓慢推进，汽车行驶中能见度逐步降低。有农民田地里的大棚被吹毁，路灯杆被吹倒。酒泉、金昌等地气象部门已发布大风、沙尘暴黄色预警信号。
据中国气象局消息，今天（3月20日）开始至23日，新一股全能型冷空气影响我国大部地区，降温、沙尘、雨雪、强对流天气齐上阵。今天，西北地区大风沙尘天气已上线，明后天将向东扫过华北、东北等多地，或发展为今年来北方最大规模的沙尘天气过程。随着冷空气南下，南方也将在21日至24日遭遇今年以来最大规模强对流天气，其中浙江、江西、广东等6省份局地有暴雨侵袭，还伴有雷暴大风及冰雹，需加强防范。