Avalanche warning for region Tromsø Wednesday 21.03.2018

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. The overlying slab is soft. • Easy to trigger • Unlikely • 2 - Medium • Many steep slopes N, NE, E, SE, S, SW, W, NW between unknown masl and 200 masl • Ga ikke utslag på lille blokktest, men kom tydelig ut i spadeprøve. Flere lag som bryter i den øverste fokksnøen, et på hagl, andre på tynne nysnølag. Vanskelig å si om de er et problem eller ikke.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • 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 • Possible • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW between 500 masl and 200 masl • fant påbegynr kantkorndannelse over skare I fokksnøen fler plasser. men I høyden var den vanskelig å finne fra 500-

• 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 • Possible • 2 - Medium • Some steep slopes N, NE, E, W, NW above 300 masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow near surface • The weak layer collapses easily and clean (easy propagation). • Very likely • Also in moderately steep terrain • Observerte oppsprekking og mye drønn i snøen på forskjellige plasser, også i relativt flatt terreng

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 • Possible • 2 - Medium • Many steep slopes above 300 masl • Litt synsing, men tror dette problemet er mer utbredt enn forholdene på lille blå tilsier. Usikker på om det bør være hovedskredproblem?

• Dry slab avalanche • Buried weak layer of surface hoar • 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. • Easy to trigger • Likely • 3 - Large • Some steep slopes N, NE, E, SE, S, SW, W, NW above 100 masl • Tenker at dette kan vurderes som hovedskredproblem basert på hvor godt stabilisert fokksnøen virker. Foreslår å slå sammen rim og kant, de to problemene finnes omtrent de samme stedene og håndteres likt.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of surface hoar • 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 • Possible • 2 - Medium • Many steep slopes E, SE, S above 300 masl

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • 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 • Likely • 2 - Medium • Many steep slopes N, NE, E, SE, S, SW, W, NW above 400 masl • sjekket et av de fjernutløste skredene og det antas at det gikk til brudd på kantkorn dannelse over skare, mulig I kombinasjon med rim?