Persistent weak layers
- Above 2,400 m
- Size
- 2
Stability: poor · Frequency: few
On shady slopes isolated danger zones due to weak layers in old snow.
Stability: poor · Frequency: few
Stability: very poor · Frequency: few
Older snowdrift accumulations lie deposited atop soft layers at high and high alpine altitudes, beneath which are often layers of faceted crystals. The snow is distributed irregularly, ridges are often totally windblown, and the fresh fallen snow does not cover the snow base sufficiently everywhere. The entire snowpack could start to glide over smooth ground.
On Friday, sunshine will prevail from early morning to evening, high-fog could in isolated cases reduce visibility somewhat in the valleys. Winds will be mostly light to moderate. At 2000m: +1 degree; at 3000m: -6 degrees. Nighttime skies Friday night will initially be clear, but high-to-intermediate altitude cloudbanks will soon move in from the southwest. The zero-degree level will descend to about 1800m.
On shady slopes isolated danger zones due to weak layers in old snow.
Avalanche danger as of 2400m is moderate, danger is low below that altitude. On shady slopes at high and high-alpine altitudes, small-to-medium slab avalanches can be treiggered in the old snow. Slab avalanches can be triggered in steep terrain particularly by large additional loading. On extremely steep grass-covered slopes, isolated small-sized glide-snow avalanches can trigger naturally. Zones beneath glide cracks should be circumvented.
The snow cover is settling to an increasing degree, avalanche danger is slowly receding. Gliding snow activity will persist.
Bulletin data: Avalanche Warning Service Salzburg (CC BY 4.0)