[AAS12-P08] The effects of boundary layer processes on snowfall in Yanqing Zone of 2022 Winter Olympic Games *BO YU1、Jia DU1、Ruixin LIU1、Yujue LIU2、Ziming LI3、Luyang XU1 (1.Beijing Municipal Weather Forecast Center、2.Institute of Urban Meteorology, China Meteorology Administration、3.Environmental Meteorology Forecast Center of Beijing-Tianjin-Hebei)