1. Department of Civil and Environmental Engineering; Politecnico di Milano; Milano Italy
2. Météo-France - CNRS, CNRM-GAME; Centre d'Etudes de la Neige; St Martin d'Héres France
3. University of Grenoble Alpes; LGGE UMR 5183; Grenoble F-38000 France
4. CNRS, LGGE UMR 5183; Grenoble F-38000 France