Key Laboratory of Cloud-Precipitation Physics and Severe Storms(LACS) of Atmospheric Physics Academy of Sciences 100029;
Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) 519080;
University of the Chinese Academy of Sciences 100049;
Public Meteorological Service Center Meteorological Administration 100044;
mesoscale convective systems; second-step terrain; mesoscale convective vortex; numerical sensitivity simulation;