Avalanche warning for region Jotunheimen Friday 02.02.2018

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within half a meter • The weak layer collapses easily and clean (easy propagation). A big and identifiable crystal in the weak layer. • Easy to trigger • Possible • 3 - Large • Many steep slopes N, NE, E, SE, S, SW, W, NW above 900 masl • Utbredt, ligger mellom stor og liten tillggdbelastning.

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within half a meter • The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. • Easy to trigger • Possible • 2 - Medium • Many steep slopes N, NE above 1200 masl • Observert to steder i samme fjellside. Kan være innslag av nedbrutte rimkrystaller.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The weak layer collapses easily and clean (easy propagation). The overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • Possible • 2 - Medium • Some steep slopes N, NW above 900 masl • Naturlig utløst brudd.

Avalanche Problems

• Buried weak layer of faceted snow above a crust • Over one meter • A big and identifiable crystal in the weak layer.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within a meter • The weak layer collapses easily and clean (easy propagation). A big and identifiable crystal in the weak layer. • Difficult to trigger • Possible • 3 - Large • Many steep slopes N, NE, E, SE, S, SW, W, NW above 0 masl • Flere skarelag med kant mellom. Noen kantorn er opp til 2 mm store

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The weak layer collapses easily and clean (easy propagation). • Difficult to trigger • Possible • 3 - Large • Many steep slopes N, NE, E, W, NW above 0 masl

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within a meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • Possible • 4 - Very large • Few steep slopes N, NE, E, SE, S, SW, W, NW above 0 masl • Dersom kantkornlaget ligger under tynnere lag med fokksnø vil det være mulig å utløse skred ved liten tilleggsbelastning. Fokksnøen i dette snøprofilet er såpass mektig at det er umulig å påvirke kantkornlaget nede i snødekket.