| The larger amounts of fresh snow last night were recorded in areas of Mont Blanc, Gran San Bernardo, La Thuile, Valgrisenche and Rhêmes Valley, with 40-60 cm between 1500 and 2500 m, then the amounts gradually decrease moving toward the eastern Aosta Valley area. The new snow goes to lean on recent snow of the previous days: the result is that in the western sector, above 2300 m, especially in Courmayeur, La Thuile and Valgrisenche areas, the amounts of loose snow reach and exceed one meter. Also today still light snowfall at the border ridges and moderate/strong winds from NW, which are winddrifting the snowpack, mainly with soft accumulations at SE exposures above 2300 m: in these locations artificial releases are reported, even at the passage of a single skier, affecting the layer of recent loose snow. Also natural release of loose snow, medium sized, above 2300 m at all aspects are reported. The avalanche danger level is equal to 4-strong in the areas of Mont Blanc, Gran San Bernardo, La Thuile, Valgrisenche and Rhêmes Valley, especially with regard to the artificial but also for the natural release. |
Structure and snowpack stability: at all aspects above 2300 m, in correspondence of slope changes anunder the ridges, new accumulations generally soft are present and growing and rest on recent loose snow, and thus, with poor resistance. Especially in the less snowy areas, above 2200-2400 m, there are always old persistent hard slabs, even large sized, covered and overloaded by the new snow and associated with a inner snowpack structure very complex and fragile, consisting in alternating crusts (wind and melt/freeze) and weak layers (faceted crystals and depth hoar) with very low resistance.