1. Department of Meteorology University of Reading Reading UK
2. National Centre for Earth Observation University of Reading Reading UK
3. Department of Atmospheric Science Colorado State University Fort Collins CO USA
4. European Centre for Medium‐Range Weather Forecasts Reading UK
5. Institute for Atmospheric and Earth System Research/Physics, Faculty of Science University of Helsinki Helsinki Finland
6. Finnish Meteorological Institute Helsinki Finland
7. Institute of Geophysics and Meteorology University of Cologne Cologne Germany