Avalanche warning for region Hallingdal Sunday 27.02.2022

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. • Difficult to trigger • 3 - Large • Few steep slopes N, NE, E, SE above 1000 masl • Det varierer i regionen hvor godt kantkornlag er utviklet. I dag fant jeg små kantkorn. I går var de opp mot kritisk str.

• Dry slab avalanche • Buried weak layer of faceted snow near surface • 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 N, NE, E, SE between 1200 masl and 900 masl • Flakene er mykere i skoggrensa og skiløpere kan påvirke tykt lag av kantkorn innad i finkornet snø. Skredstr mellom 1 og 2 grunnet tykt svakt lag, relativt mykt flak over og relativt myk underliggende snø.

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 • 3 - Large • Some steep slopes N, NE, E, SE, S above 1000 masl

Avalanche Problems

• Loose dry avalanche • Buried weak layer of faceted snow near surface • Within half a meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • Few steep slopes N, NE, E, SE, S above 1000 masl

• 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 • 3 - Large • Few steep slopes N, NE, E, SE, S, SW, W, NW above 1000 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 • Few steep slopes N, NE, E, SE, S between 1200 masl and 1000 masl • antar at flaket er vanskelig å påvirke høyere opp, men da større skred. mest problematisk i område rundt skoggrensa

• 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 • 3 - Large • Some steep slopes N, NE, E, SE, S above 1000 masl • kantkorn over skare finnes mange steder. kan påvirkes lettere der overliggende snø er tynnere eller mykere. overliggende snø er avgjørende for utbredelsen av problemet. overliggende snø finnes først og fremst i østlig sektor.

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 • Few steep slopes N, NE, E, SE, S between 1200 masl and 1000 masl • Mest problematisk i skoggrensa

• 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 • 3 - Large • Some steep slopes N, NE, E, SE, S above 1000 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within a meter • Difficult to trigger • 3 - Large • Some steep slopes N, NE, E, SE, S above 1000 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 • Few steep slopes N, NE, E between 1200 masl and 1000 masl • Problemet er mest fremtredende i skoggrensa.

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within 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 • Some steep slopes N, NE, E, SE, S above 1000 masl • Kantkorn finnes mange steder. Der flak er tilstede vil dette svake laget være ett problem.

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 • 3 - Large • Some steep slopes N, NE, E, SE, S above 1000 masl • Kantkorn over skare finnes mange steder. Kan påvirkes lettere der overliggende snødekke er tynnere eller flaket mykere. Overliggende snø er avgjørende for utbredelsen av problemet.

• 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. • Easy to trigger • 1 - Small • Few steep slopes N, NE, E, SE, S between 1200 masl and 900 masl • Antar at flaket er vanskeligere å påvirke høyere opp, men med mulig større skredstørrelse. Lenger ned i skogen var det mindre lagdeling og flaket mindre bundet.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of surface hoar • Within half a meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • 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 • N, NE, E, SE, S, SW, W, NW between unknown masl and unknown 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. • Difficult to trigger • 3 - Large • Few steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • A big and identifiable crystal in the weak layer. • Easy to trigger • Few steep slopes NE, E, SE, S above 1000 masl • Finner ikke det svake laget i profilen, men tidvis kraftig vind med kraftig snøfokk og snøbyge med Ca 5-8 cm snø har dannet ferske fokksnøflak i østlige eksposisjoner.

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. • Very difficult to trigger • 3 - Large • Few steep slopes NE, E, SE, S above 1000 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within half a meter • The collapsing weak layer is thin < 3 cm. • Easy to trigger • 2 - Medium • Some steep slopes NE, E, SE above 1000 masl

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Over one meter • The collapsing weak layer is thin < 3 cm. • Very difficult to trigger • 3 - Large • N, NE, E, SE, S, SW, W, NW above 1000 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. • Difficult to trigger • 3 - Large • Few steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • Within a meter • The collapsing weak layer is thin < 3 cm. • Very difficult to trigger • 3 - Large • Few steep slopes N, NE, E, SE, S above 1200 masl • SSU ble utført på et meget vindutsatt sted og nok ikke veldig representativt. Svakt lag: Kantkornlag inne i fokksnøen. Overliggende lag er svært hardt.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Over one meter • Very difficult to trigger • 3 - Large • Some steep slopes NE, E, SE, S above 1100 masl

Avalanche Problems

• Dry slab avalanche • Poor bonding between layers in wind deposited snow • Within a meter • The collapsing weak layer is thin < 3 cm. • Very difficult to trigger • 3 - Large • Some steep slopes N, NE, E, SE, S above 1200 masl