Bollettino valanghe

At night in southern regions above 1600m: Danger Level 4 (high) will be reached. Increasing naturally triggered avalanches.

At night in southern regions above 1600m: Danger Level 4 (high) will be reached. Increasing naturally triggered avalanches.

During the night, increasingly frequent naturally avalanches are expected, triggerable in the old snow and on shady slopes where they can grow to large size. In addition, avalanches can be triggered in the near-surface layers by large additional loading, these can often sweep along the thoroughly wet snowpack. Caution urged at the foot of rock walls, behind protruberances, and in gullies and bowls. Activity of small-to-medium loose-snow avalanches will increase significantly. Runout zones should be circumvented. On very steep grass-covered slopes, glide-snow avalanches are possible, also medium sized releases. Some transportation routes can be placed at risk.

Since Wednesday above 1800m, about 50-80 cm of fresh snow has been registered, locally more. Above 1400m 30-50cm of fresh snow still expected. Winds will transport the fresh snow. Fresh snow and drifts are being deposited on shady slopes above 1800m atop an unfavorable old snowpack surface (soft layers). More deeply embedded inside the snowpack, esp. on shady slopes, there are expansively metamorphosed (faceted) weak layers, esp. above 2000m.

On Saturday, snowfall level will ascend to 1000m and by afternoon to 1400m. In exposed terrain, strong S/SW winds (60 km/hr). At 2000m: +1 degree in afternoon; at 1000m: 3 degrees.

Naturally triggered dry-snow avalanches will gradually decrease as the snowfall ends. Glide-snow avalanches can trigger at any time of day or night.