1. a State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China
2. b Public Weather Service Center, Hebei Meteorological Bureau, Shijiazhuang, China
3. c National Satellite Meteorology Center, China Meteorological Administration, Beijing, China
4. d Cooperative Institute for Mesoscale Meteorological Studies, University of Oklahoma, Norman, Oklahoma
5. e Meteorological Observation Center, China Meteorological Administration, Beijing, China
6. f State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China