Avalanche warning for region Jotunheimen Sunday 05.04.2020

Avalanche Problems

• Loose wet avalanche • Loose snow • Spontaneous release • 1 - Small • Many steep slopes N, NE, E, SE, S, SW, W, NW below 1200 masl • Nå ble det lett yr i lufta her på trutagrø. Kanskje noe str 2 også i områder med innblåst snø.

• 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. • Difficult to trigger • 3 - Large • Some steep slopes N, NE, E, SE above 1000 masl • Usikker på utløsbarhet. Laget vil trolig finnes i alle himmelretninger med overliggende flak vil trolig begrense seg til leformasjoner

• 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 N, NE, E, SE above 1200 masl • Ferskeste fokksnø en. Med nå værende temp vil stabilisering gå raskt.

Avalanche Problems

• Loose dry avalanche • Loose snow • Difficult to trigger • 3 - Large

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 overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • 2 - Medium • Some steep slopes NE, E, SE above 1300 masl

• 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. • Easy to trigger • 2 - Medium • Few steep slopes N, NE, E, SE above 1300 masl

• 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. • Easy to trigger • 2 - Medium • Few steep slopes N, NE, E, SE above 1300 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 • Some steep slopes N, NE, E, SE above 1300 masl

• Dry slab avalanche • Poor bonding between crust and overlying 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 above 1300 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). A big and identifiable crystal in the weak layer. • Easy to trigger • 2 - Medium • Some steep slopes NE, E, SE, S above 900 masl

• 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, SW, W, NW above unknown masl

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • The overlying slab is soft. A big and identifiable crystal in the weak layer. • Easy to trigger • 2 - Medium • Some steep slopes NE, E, SE between 1400 masl and 1000 masl • Hovedskredproblemet i dag. Men det svake løssnølaget er relativt tykt og med rue bruddflater, så skredene som løsner ved liten belastning vil trolig være opp til str. 2. Større skred kan selvsagt løsne der flakene oppå er hardere, men større belastning må trolig til. Muligheter for stepdown da det er flere sjikt og stedvis kantkorn på/ mellom skare lenger ned i snødekket.

• 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 NE, E, SE, S above 900 masl • Kantkorn i forbindele med mildværsskaren forrige uke kan trolig påvirkes der snødekket er tynnere. Utbredelsen er trolig ikke svært stor, da jeg tok flere LBT og gravinger uten å finne markante lag endre steder enn der jeg tok snøprofilen. En del naturlig utløste skred siste dagene med god forplantning har trolig gått på dette laget så det kan antas å finnes, men man vil trolig også oppleve å ikke finne det.. Vanskelig å finne og vite utbredelsen av, men må ikke undervurderes!