Avalanche warning for region Jotunheimen Thursday 18.01.2018

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • The collapsing weak layer is thin < 3 cm. The overlying slab is soft. A big and identifiable crystal in the weak layer. • 3 - Large • Some steep slopes N between 1600 masl and 0 masl • Skredproblemet ligger i lokale terrengformasjoner med lav utbredelse.

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • Possible • 1 - Small • Few steep slopes SE, S, SW • Lokal flakdannelse med sjiktovergang, overganger fra flak til løs gammel snø i mindre terrengformasjoner.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Over one meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • Unlikely • 3 - Large • Few steep slopes S between 1500 masl and 0 masl • Lokale små terrengformasjoner, lav utbredelse-

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Over one meter • The collapsing weak layer is thin < 3 cm. • Easy to trigger • Possible • 2 - Medium • Some steep slopes N, NE, NW between 1600 masl and 800 masl • Overflaten er myk mange steder der den ferske snøen ligger. Men det er mye hard gammel snø i form av skavler. Det er vanskelig å provosere ut skred på den gamle snøen. Men i konvekse heng med fine konvekse puter, nordlige hellinger, er det mulig å løse ut str 2-3 skred. Den ferske snøen binder godt til underlaget og de fleste steder er flaket med fersk snø for mykt.

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). The collapsing weak layer is thin < 3 cm. The overlying slab is soft. • Easy to trigger • Possible • 2 - Medium • Many steep slopes N, NE, NW above 1000 masl

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within 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 • 3 - Large • Many steep slopes N, NE, E, SE, S, SW, W, NW above 900 masl • Utbredt, men varierende overdekning og sensitivitet for belastning.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Over one meter • The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. The overlying slab is soft. • Many steep slopes N, NE, E, SE, S, SW, W, NW

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Difficult to trigger • Possible • 2 - Medium • Some steep slopes N, W, NW below 0 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Over one meter • The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. • Difficult to trigger • Likely • 3 - Large • Many steep slopes N, NE, E, W, NW

Avalanche Problems

• Loose snow • The overlying slab is soft.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within a meter • The overlying slab is soft. • Difficult to trigger • Possible • 2 - Medium • Few steep slopes