Avalanche warning for region Jotunheimen Thursday 23.02.2023

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Over one meter • Difficult to trigger • 3 - Large • Denne undersøkelsen må ses i forbindelse med ID-33 13 93. Vi ønsket og undersøke utbredelsen av det oppbyggende RGxf laget over skaren vi fant der. Vår konklusjon er at dette problemet ikke er veldig utbredt enda, da vi kun fant RGxf i terreng som hadde hatt lite til ingen opplagring av snø tidligere.

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. • Difficult to trigger • 2 - Medium • Some steep slopes NE, E, SE, S, SW • Fikk utslag på dette på lille blokktest. Bruddet var glatt men måtte bruke mye kraft. Bruddet skjedde over et skarelag.

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Over one meter • A big and identifiable crystal in the weak layer. • Very difficult to trigger • 3 - Large • Many steep slopes N, NE, E, SE, S, SW, W, NW • Kantkornet lag ved bakken som er dekket av tykke lag med både fokksnø og smelteformer.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within half a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 2 - Medium • Few steep slopes N, NE, E, SE, S, SW, W, NW between unknown masl and 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 collapsing weak layer is thin < 3 cm. The overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • 1 - Small • Some steep slopes N, W, NW above 1100 masl

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • 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 N, NE, E, SE, S, SW, W, NW above 1100 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. • Difficult to trigger • 3 - Large • Some steep slopes N, NE, E, SE, S, SW, W, NW

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 NE, E, SE, S above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. A big and identifiable crystal in the weak layer. • Difficult to trigger • 3 - Large • Few steep slopes below unknown masl • Vanskelig å påvirke, men muligheter for bruddforplantning om stor tilleggslast eks skavler faller ned på dette. Da kan skred bli store. Det er altså vedvarende svake lag i snødekket som kan gi bruddforplantning! Vi så også et stort skred på lang avstand i Leirholet

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. • Easy to trigger • 5 - Extremely large • Some steep slopes between unknown masl and unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within a meter • The weak layer collapses easily and clean (easy propagation). A big and identifiable crystal in the weak layer. • Easy to trigger • 4 - Very large • S, SW above 1700 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The overlying slab is soft. • Difficult to trigger • 1 - Small • Some steep slopes E, SE, S

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within a meter • The weak layer collapses easily and clean (easy propagation). • S between unknown masl and unknown masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, NW • Vinden har flytta mykje snø særleg inn i aust- og nordvendte heng. Det har gått ein del naturlege små skred, men med unnatak av i bratte heng verker snødekket i området bra stabilt. Det vart ikkje observert kantkornlag av betyding, men gravde ikkje så mange profilar

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. • Difficult to trigger • 2 - Medium • Some steep slopes E, SE, S above 1200 masl

• 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 • Some steep slopes N, NE, E, SE, S, SW, W, NW below 1200 masl • I tregrensa.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • The overlying slab is soft. • Difficult to trigger