Avalanche warning for region Indre Troms Thursday 13.02.2020

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • 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. • Easy to trigger • 2 - Medium • Few steep slopes N, NE, E, SE, S, SW, W, NW above 300 masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The collapsing weak layer is thin < 3 cm. • Easy to trigger • 1 - Small • SW above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 2 - Medium • Many steep slopes N, NE, E, SE, S, SW, W, NW above unknown masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between crust and overlying snow • Within half a meter • The collapsing weak layer is thin < 3 cm. • Easy to trigger • Few steep slopes N, NE, E, SE, S, SW, W, NW above 400 masl

Avalanche Problems

• Buried weak layer of faceted snow above a crust • Within half a meter • The collapsing weak layer is thin < 3 cm.

Avalanche Problems

• Dry slab avalanche • Poor bonding between crust and overlying snow • Within half a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 1 - Small • NW above unknown 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 • 2 - Medium • above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • Difficult to trigger • 3 - Large • between unknown masl and unknown masl

Avalanche Problems

• 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. The overlying slab is soft. A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • S between 500 masl and unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • The collapsing weak layer is thin < 3 cm. • Very difficult to trigger • 2 - Medium • Few steep slopes N, W, NW between 400 masl and unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW between unknown masl and 300 masl • Det svake laget finnes også igjen i andre eksponeringer (NV) under graving av hurtigpiter, funnet ved bruk av lille blokktest. Store fasetter under det samme skarelaget.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within half a meter • The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • N, NE, NW above unknown masl

Avalanche Problems

• Loose dry avalanche • Loose snow • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, NW above 400 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • SW above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Over one meter • Difficult to trigger • Possible • 3 - Large • between unknown masl and 0 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • SW

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • 3 - Large • Few steep slopes S, SW, W between 600 masl and 300 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • 3 - Large • Few steep slopes S, SW, W between 600 masl and 300 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • The collapsing weak layer is thin < 3 cm. The overlying slab is soft. A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW between unknown masl and 400 masl

Avalanche Problems

• Buried weak layer of new snow • Within half a meter • The collapsing weak layer is thin < 3 cm. • N, NE, E, SE, S, SW, W, NW

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 1 - Small • E above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within a meter • The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within a meter • Very difficult to trigger • Unknown • SW

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • The weak layer collapses easily and clean (easy propagation). A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • Some steep slopes SW, W, NW between 800 masl and 400 masl • Kjenner ikke til om det er skattlagt i høyfjellet

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). The overlying slab is soft. A big and identifiable crystal in the weak layer. • SW, W, NW between 700 masl and 400 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within a meter • The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • Very difficult to trigger • 3 - Large • Few steep slopes S, SW, W between 600 masl and unknown masl

Avalanche Problems

• Dry slab avalanche • Within a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 2 - Medium • Some steep slopes SE, S, SW between 800 masl and 500 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • Difficult to trigger • 3 - Large • Some steep slopes E, SE, S, SW between 1100 masl and 500 masl • Vind fra vest og økt vind høyere i fjellet kan medføre økt pålagring i østlige eksposisjoner.

Avalanche Problems

• 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 • Few steep slopes S, SW, W between 600 masl and 0 masl • Vanskelig å løse ut, men forplantningen skjer lett

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The collapsing weak layer is thin < 3 cm. The overlying slab is soft. • Very easy to trigger • 1 - Small • SE, S above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The collapsing weak layer is thin < 3 cm. The overlying slab is soft. A big and identifiable crystal in the weak layer. • Difficult to trigger • 1 - Small • Some steep slopes SE above 500 masl

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • 3 - Large • Some steep slopes SE above 500 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • A big and identifiable crystal in the weak layer. • Very difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S between 700 masl and 400 masl

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S above 500 masl • Vindtransportert snø deponert i lesider, antas å kunne utgjøre et skredproblem i bratte heng.

Avalanche Problems

• Loose snow • Very difficult to trigger

Avalanche Problems

• Buried weak layer of faceted snow beneath a crust • Over one meter • Many steep slopes NE, E, SE above unknown masl

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 • 2 - Medium • Some steep slopes N, NE, E, SE, S above 500 masl • Moderat snøfokk over 500moh og ca 15 cm nysnø siste døgn gir moderat oppbygging av fokksnøflak med ustabile lag av nedføyket løs snø i noen til mange heng i NØ til SØ eksposisjoner.

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within half a meter • The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • Few steep slopes N, NE, E, SE, S, SW, W, NW between 800 masl and 400 masl • Det er funnet vedvarende svake lag av kantkorn i store deler av regionen og i de fleste himmelretninger. Det virker som om de svake lagene er mest utviklet i indre del av regionen (Målselvdalen). Det skal stor tillegsbelastning til for å påvirke lagene. Moderat pålagring av fersk fokksnø i NØ til SØ eksposisjoner vil kunne gi enkelte store str 3 skred dersom kantkornlaget går til brudd.