1. a Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China
2. b Cooperative Institute for Mesoscale Meteorological Studies, University of Oklahoma, Norman, Oklahoma, USA
3. c School of Meteorology, University of Oklahoma, Norman, Oklahoma, USA
4. h Center for Analysis and Prediction of Storms (CAPS), University of Oklahoma, Norman, Oklahoma, USA
5. d Laboratoire de Météorologie Physique, UCA, CNRS, Aubière, France
6. e Australian Bureau of Meteorology, Melbourne, Australia
7. f Environment and Climate Change Canada, Toronto, M3H 5T4, Canada
8. g Department of Atmospheric Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA