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Snow cover Snow depths are generally well below average for the time of year. Above around 2800 m, the deepest snow cover, ranging between 40 to 60 cm, can be found in Lower Valais, on the northern Alpine ridge from Diablerets to Titlis and in the Bernina region. In the other regions, the old snow cover is very thin and is in places contiguous, particularly on shady slopes above 2500m.
The snowpack contains widespread weak layers on high-altitude shady slopes. In areas where the snowpack is already contiguous and the terrain roughness is uniform, avalanches may be triggered in places within these weak layers of old snow.