Avalanche warning for region Indre Sogn Wednesday 04.01.2023

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within a meter • A big and identifiable crystal in the weak layer. • Easy to trigger • 3 - Large • Few steep slopes N, NE, E, SE, S, SW, W, NW above 800 masl • Kvar det går skred vil vere begrensa av kor tjukt og samanhengande flaket over kantkornet er, terrengruheit i underlaget og randkrefter som held flaket. Ser for meg at bratte heng/sva/hamrar uten særleg understøtte rett ved og rett over skoggrensa er utsatt og NØ-vendt terreng oppe i høgda som har samla ein del snø og det evt. ligg snø igjen frå i fjor.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within a meter • A big and identifiable crystal in the weak layer. • Easy to trigger • 1 - Small • Some steep slopes N, NE, E, SE, S, SW, W, NW above 900 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. • Easy to trigger • 2 - Medium • Few steep slopes N, NE, E, SE, S, SW, W, NW above 700 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. • Easy to trigger • 2 - Medium • Some steep slopes E, SE, NW above 1200 masl • Ut i fra observasjon i fjellet er det på steder med glatt underlag som gress og sva, hvor skred kan gå

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. • Easy to trigger • 2 - Medium • Few steep slopes E, SE above 800 masl

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • The overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • 3 - Large • Few steep slopes N, NE, E, SE, S, SW, W, NW above 800 masl • Avhengig av ruhet på terreng og om det er dannet flak

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. • Easy to trigger • 2 - Medium • Some steep slopes E, SE, NW above 1000 masl • Kan gå på svaberg og gras.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within half a meter • The overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • 1 - Small • Many steep slopes N, NE, E, SE, S, SW, W, NW above 800 masl • Det svake kantkornlaget finner man som regel igjen i høyder fra skoggrensa og oppover. Kantkornlaget er tykt og har veldig ujevnt bruddplan, dårlig glideplan. Så lenge bakken er ujevn skal det ekstra til å få et skred til å gå, men man må være obs på steder som svaberg og lignende glatte naturlige formasjoner.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Over one meter • 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, SW, W, NW above 600 masl

• 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 • 1 - Small • Few steep slopes N, NE, S, SW, W, NW between 1000 masl and unknown masl • Der fins lagdeling i små le sider der snøen er myk (F/4F)

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Over one meter • The weak layer collapses easily and clean (easy propagation). • Very easy to trigger • 2 - Medium • Some steep slopes NE, E above 800 masl

Avalanche Problems

• 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 • 2 - Medium • Few steep slopes N, NE, E, SE, S, SW, W, NW above 700 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. • Easy to trigger • 1 - Small • Some steep slopes N, NE, E, SE, S, SW, W, NW above 800 masl

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • 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 800 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within a meter • The overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • 1 - Small • Some steep slopes NE, E, SE, S, SW above 600 masl • Observert i angitte eksposisjoner i dag

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within half a meter • The overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • 2 - Medium • Few steep slopes above 700 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. • Easy to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 800 masl • Det som gjør distributionen temmelig begrenset er fraværet av glideyte. Kollapsen skjer rett på bakken, og bakken må agere glidyte.

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The collapsing weak layer is thin < 3 cm. The overlying slab is soft. • Difficult to trigger • 1 - Small • Some steep slopes N, NE, E, W, NW above 900 masl • Har bare sett S-vendte sider, men da det dr tydelige tegn på vind fra S tror jeg problemet fremst er utbredt på N-side.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • 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 700 masl • litt usikkert på lett å løse ut. fikk drønn bare ved hopping.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The collapsing weak layer is thin < 3 cm. • Easy to trigger • 2 - Medium • Some steep slopes N, SW, W, NW above 800 masl • Finnes fokksnø i flere himmelretninger. Ventes i vestlig sektor i morgen med sø vind.

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within half a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 2 - Medium • Few steep slopes NE, E, SE, S above 800 masl • Får utslag på test i tynt lag med nedføyket snø som er noe kantet ca 0,4-0,5m ned i snødekket. Vanskelig å påvirke lag der snødekke er mektig. Klarte ikke å påvirke lag m kantkorn ved bakken i dette område, trolig for mektig snødekke.

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. • Easy to trigger • 2 - Medium • Some steep slopes E, SE, NW above 1000 masl • Det svake laget er tykkt og bryter ujevnt. Lettest å løse ut ved glatte og bratte underlag.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • The weak layer collapses easily and clean (easy propagation). A big and identifiable crystal in the weak layer. • Easy to trigger • 3 - Large • Some steep slopes N, NE, E, SE, S, SW, W, NW above 800 masl • Utbredelse er avhengig av snømengde og om det er flak tilstede. Det er store lokale forskjeller i regionen. Utløsbarhet er og avhenging av snødybde. Der snødekket er tynt vil en lettere klare å påvirke

• 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 • 2 - Medium • Few steep slopes E, SE, S above 800 masl • Vind har frakta snø, og dannet flak i leformasjoner. Der snøen er myk er det lett å påvirke, men vil trolig ikke bli spesielt stort. Der flakene er hardere er det vanskeligere å påvirke men disse kak bli større.