1. University of Ljubljana, Ljubljana, Slovenia
2. University of Michigan, Ann Arbor, Michigan
3. National Center for Atmospheric Research,* Boulder, Colorado
4. European Centre for Medium-Range Weather Forecasts, Reading, United Kingdom
5. University of Tsukuba, Tsukuba, Ibaraki, Japan
6. CNRM-GAME, Météo-France, and CNRS, Toulouse, France