A sandstorm engulfed Beijing again, plunging it into severe air pollution on April 11.

The Beijing Meteorological Observatory issued a yellow warning signal (the lowest level) for the sandstorm on the evening of April 10.

The official website of the Beijing Municipal Ecology and Environment Monitoring Centre reported that the primary pollutant in the air was inhalable particulate matter (PM10), with a concentration exceeding 1000 micrograms per cubic metre, resulting in severe pollution.

Due to the upstream sand and dust transportation, it is predicted that from 9:00 pm on April 10 to 5:00 pm on April 11, there will be significant sandstorm weather in Beijing, with most areas having visibility less than 1000 metres.

The observatory also issued a yellow warning (the third strongest level) for strong winds, forecasting the speed of winds to reach 55.3mph to 63.4mph.

The air quality index in Beijing has reached level 6 (severe pollution) for 13 consecutive hours, of which the air quality index value is more than 300.

The video was provided by local media with permission.

4月11日，北京市出现大范围沙尘天气，北风呼啸，伴着沙尘，漫天昏黄。北京市生态环境监测中心官网显示，北京市首要污染物为可吸入颗粒物(PM10)，浓度持续超过1000微克/立方米，空气质量为严重污染。
北京市气象台10日20时升级发布沙尘暴黄色预警信号，受上游沙尘输送影响，预计10日21时至11日17时，北京市有明显沙尘天气，大部分地区最低能见度小于1000米。同时升级发布大风黄色预警信号，预计当前至11日17时，北京市有5级左右偏北风，阵风8、9级，局地可达10级，请注意防范。
今年以来，我国已出现8次沙尘天气过程，4月9日以来的沙尘天气过程达到沙尘暴级别，为今年第二次沙尘暴过程，弱于3月19日至24日的强沙尘暴过程。