Vallon de Saint-Imier — Boletín de aludes

SnowpackThe old snowpack contains various weak layers. In particular on wind-sheltered shady slopes, surface hoar is in some cases covered by snow. Deeper in the snowpack there are faceted layers, which in isolated cases are still prone to triggering, especially on seldom-used slopes with little snow cover. As daytime temperatures rise and the surface starts to moisten, in some places, the likelihood of even dry avalanches being triggered is increasing during the course of each day.Moreover, all regions can expect to see wet snow avalanches over the course of each day. Isolated wet slab avalanches may also be triggered by human activity. Gliding avalanches are to be expected mainly north of a line from the Rhône to the Rhine and also mostly tend to occur as the day progresses.