Avalanche warning for region Hallingdal Monday 09.12.2019

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes above 800 masl

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Over one meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • Some steep slopes • Vi fant kantkorn langs bakken både over og under skare. En annen gruppe hørte et drønn i samme området, men vi klarte ikke å fremprovosere noe initiering eller propagering. Det lå mer enn 1 meter dypt der vi gravde, men gjennomsnittlig dybde er nok noe mindre. Snødybden varierer mye i terrenget som følge av vindtransportert snø.

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes SE, S, SW, W above 1000 masl • Utbredelsen av skredproblemet er relativt stor da vinden har dreid en del siste døgn

• 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 • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes SE, S, SW, W above 1000 masl • Utbredelsen av skredproblemet er relativt stor da vinden har dreid en del siste døgn

• 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 • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes SE, S, SW, W above 1000 masl • Utbredelsen av skredproblemet er relativt stor da vinden har dreid en del siste døgn

• 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 • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes SE, S, SW, W above 1000 masl • Utbredelsen av skredproblemet er relativt stor da vinden har dreid en del siste døgn

• 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 • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes SE, S, SW, W above 1000 masl • Utbredelsen av skredproblemet er relativt stor da vinden har dreid en del siste døgn

• 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 • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within half a meter • The overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes SE, S, SW, W above 1000 masl • Utbredelsen av skredproblemet er relativt stor da vinden har dreid en del siste døgn

• 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 • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

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 overlying slab is soft. • Easy to trigger • 2 - Medium • Some steep slopes NE, E, SE, S above 1000 masl • Det fins ustabile sjikt i fokksnøen, men mengdene fersk fokksnø er relativt små slik at forventet skredstørrelse er str 1 i denne delen av regionen. Det er antagelig større snømengder vest i regionen så en må ta høyde for skred str 2 regionen sett under ett.

• 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 • 2 - Medium • Few steep slopes N, NE, E, SE, S, SW, W, NW above 800 masl • Det fins kantkornlag stedvis ved bakken og stedvis over skarelag. Snødekket er stort sett tynt, oppbrutt av rabber, stein og skavler slik at større sammenhengende områder som kan gi skred på dette kantkornlaget knapt er å finne, derfor få bratte heng. Snødekket er tykkest i heng mot øst som har fått påfyll av fokksnø, men her virker kantkornlag å være lite utviklet evt under 150-200 cm kompakt fokksnø.