[Shaanxi Provincial Meteorological Observatory issues Sandstorm Yellow warning] April 20, Shaanxi Provincial Meteorological Observatory issued a yellow sandstorm warning signal at 11:07 on April 20: at present, sand and dust weather has occurred in most of northern Shaanxi and Guanzhong. The following areas are expected to maintain blowing sand or floating dust in the next 12 hours: Yulin City, Yan'an City, Tongchuan City, Baoji City, Xi'an City, Weinan City, Xianyang City, Shangluo City, Yangling District, Yangling demonstration Zone. The meteorological department reminds the relevant units and the general public to pay attention to precautions.