Persistent weak layers
- Above 1,800 m
- Size
- 2
Stability: poor · Frequency: some
Snowdrifts often lie deposited on weak old snow.
Stability: poor · Frequency: some
Stability: poor · Frequency: few
Snowdrifts often lie deposited on weak old snow.
Avalanche danger above 1800m is moderate, danger is low below that altitude. Fresh and older snowdrifts are the major problem, these can trigger a small-to-medium sized slab avalanche by minimum additional loading in some places. They are blanketed by just a bit of fresh snow, making them hard to recognize. Danger zones occur near to ridgelines, in all aspects and in wind-loaded gullies and bowls. Frequency of avalanche prone locations tends to increase with ascending altitudes.
A few centimetres of powder snow blanket the snowdrifted masses from the last few days. These drifts lie at 1800-2100m atop a melt-freeze crust which formed last Friday, under which a trigger-sensitve layer of faceted crystals has formed in some places. In addition, inside the old snowdrifted masses there are often weak intermediate layers. The old snowpack fundament is highly diverse in thickness, in exposed zones it is often lacking completely.
Avalanche danger levels are expected to slowly recede.
Bulletin data: Avalanche Warning Service Bavaria (CC BY 4.0)