Avalanche warning for region Jotunheimen Monday 16.03.2020

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 • 2 - Medium • Some steep slopes N, NE, E, SE, S above unknown masl • Finnes rimkrystaller iblandet nysnøen. Antar disse har overlevd bedre i skarpere leheng

• 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 • Few steep slopes N, NE, E, SE, S, SW, W, NW between 1200 masl and 800 masl • Kantkorna snø over skare. Funnet dette problemet på mange turer. Forsvinner med høyden hvor temp ikke har laget skaren. Antageligvis dette som skapte store skredet ved haukeberget

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • The collapsing weak layer is thin < 3 cm. 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 • Store tydelige krystaller hvor jeg gravde på 1300moh. Bryter uryddig og med en del tilleggsbelastning.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • 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 • Many steep slopes N, NE, E, NW above 1100 masl • Gjelder generelt. Bruddet skjer rett under et 1F fast tynt fokksnølag, altså øverst i laussnøen, og der var det ofte rimkrystaller.

• 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. A big and identifiable crystal in the weak layer. • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E above 1400 masl • Eksponering bedømt ut fra stedet påvist, men kan være i flere hengretninger.

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within half a meter • A big and identifiable crystal in the weak layer. • Difficult to trigger • 3 - Large • Many steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl • Dette gjelder generelt i dette området.

• 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. • Easy to trigger • 2 - Medium • Few steep slopes N, NE, E, NW above 1100 masl • Gjelder spesielt der fokksnøen la seg på gammel fokksnø eller skare, i kommer og forsenkninger. Finnes også i overgangen mellom overliggende fokksnø og et lag lausere snø.

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 • 1 - Small • Some steep slopes N, NE, E, NW above 1000 masl • I skjermede lommer i terrenget, etter en natt med klart og kaldt vær. Gamle snøoverflaten hadde endel fuktighet som trolig har bidratt til prosessen.

• 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 N, NE, E, NW above 1000 masl • For det meste nedføyket laus fokksnø. Kun 1-2 cm nysnø i natt.