Affected by Mongolia Cyclone, a Sand Dust Storm (SDS) event  occurs on the afternoon on 18 March 2020 and it could last for about 12 hours. The affected areas and cities include: Western Inner Mongolia, northern Shanxi, central and northern Hebei, Beijing, Tianjin and other places, with 6-7 level wind and 8-9 level gust. (Source: RSMC-ASDF Beijing)