National Meteorological Centre;
Beijing 100081;
China;
School of Atmospheric Sciences;
Nanjing University;
Nanjing 210023;
China;
Center for Analysis and Prediction of Storms;
Oklahoma University;
Norman OK 73072;
USA;
University of Illinois at Urbana-Champaign;
Champaign;
IL 61820;
USA;
Peking University;
Beijing 100871;
China;