1. a European Severe Storms Laboratory, Wessling, Germany
2. b Institut für Meteorologie, Freie Universität Berlin, Berlin, Germany
3. c European Severe Storms Laboratory–Science and Training, Wiener Neustadt, Austria
4. d Department of Meteorology and Climatology, Adam Mickiewicz University, Poznań, Poland
5. e National Severe Storms Laboratory, Norman, Oklahoma