Allgäu Alps Central

Fresh trigger-sensitive snowdrifts

Fresh trigger-sensitive snowdrifts

Avalanche danger above 1700 m is considerable, below that altitude moderate. The main problem: the fresh fallen snow which is being transported by strong winds. Small-to-medium slab avalanches can be triggered even by minimum additional loading, i.e. the weight of one single skier. Many avalanche prone locations are found on steep ridgeline slopes in all aspects, in freshly wind-loaded gullies and bowls and behind protruberances. With ascending altitude the frequency of danger zones increases and, thereby, also the potential size of avalanches which trigger. The accumulations are ongoingly getting blanketed by fresh batches of snowfall, making them difficult to recognize, including for experts. IN steep rocky terrain, furthermore, naturally triggered medium-sized loose snow avalanches can be expected. Apart from that, the danger of isolated medium-sized glide-snow avalanches still prevails on steep grass-covered slopes which have not yet discharged and in forest clearances.

On Wednesday and Thursday, 20-30 cm of overall snowfall is expected, intensively transported by strong winds. At higher altitudes, bonding of the drifts to the melt-freeze encrusted, in some places icy surface is poor. In some places, trigger-sensitive intermediate layers are wedged inside the snowdrifts. The fundament is stable. Below 1700 m, bonding with the wet old snowpack surface is good. At low altitudes the fresh snow often was deposited directly on wet ground.

Avalanche danger is not expected to change significantly on Friday.