1. Department of Earth Physics and Astrophysics, Faculty of Physics Complutense University of Madrid Madrid Spain
2. State Meteorological Agency (AEMET) Santander Spain
3. Interdisciplinary Mathematics Institute Complutense University of Madrid Madrid Spain
4. Atmospheric Physics Group, IMA University of León León Spain
5. Department of Applied Mathematics, Faculty of Computer Engineering University of Valladolid Valladolid Spain