A couple of back country enthusiast triggered a slab avalanche close to the Col du Planbois on the north side of the Montagne de Sullens (1839 meters) near Manigod in the Aravis mountain range. The alert was given to the rescue services a little before 1pm and members of the Chamonix PGHM were dispatched to the scene. The victim, 60 year old woman, was found using probes. She was transported by helicopter to Annecy in a critical condition. Another person with the woman was unharmed.