Avalanche warning for region Jotunheimen Saturday 28.01.2023

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within a meter • The weak layer collapses easily and clean (easy propagation). The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 3 - Large • Some steep slopes N, NE, E, SE, S above 900 masl

Avalanche Problems

• 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. A big and identifiable crystal in the weak layer. • Easy to trigger • 2 - Medium • Many steep slopes N, NE, E

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. • Difficult to trigger • 3 - Large • Some steep slopes NE, E, SE, S above 1000 masl • Usikker på om det også gjelder i alle eksposisjoner. Hvis man tenker beger og kant i bunn så ja. Men her lå det høyere. Kan ha vært tilfeldig..?

• Dry slab avalanche • Poor bonding between crust and overlying snow • Within half a meter • The collapsing weak layer is thin < 3 cm. The overlying slab is soft. • Easy to trigger • 1 - Small • Few steep slopes E, SE, S above 1000 masl

Avalanche Problems

• 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 • 1 - Small • Some steep slopes NE, E, SE above 1000 masl • Fant ikkje dette laget i profilen, men det vart observert tidlegare på turen.

• Dry slab avalanche • Poor bonding between crust and overlying snow • Within half a meter • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S above 1000 masl • Dårleg binding mellom skare og underliggande fokksnø.

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Over one meter • A big and identifiable crystal in the weak layer. • Very difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl • Observerte kantkorn ved bakken gjennom heile turen. Frå 1100moh til 1380moh

Avalanche Problems

• 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. A big and identifiable crystal in the weak layer. • Easy to trigger • 2 - Medium • Few steep slopes NE, E, SE above 900 masl • Noe snø fra siste døgn har blitt transportert inn i leheng og finnes som fokksnøflak. Enkelte sjiktoverganger i fokksnø.

• Dry slab avalanche • Buried weak layer of faceted snow near the ground • Within a meter • A big and identifiable crystal in the weak layer. • Very difficult to trigger • 3 - Large • Some steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl • Kantkorn finnes fremdeles i snødekket. Under 1000 moh er snødekket mange plasser gjennomfuktet og kantkornlag er mindre potent. Overliggende flak er stabilisert med skarelag og kantkornlag har vanskelig for å bli påvirket, samt lavere propageringsevne.

Avalanche Problems

• Dry slab avalanche • Easy to trigger • 2 - Medium • Some steep slopes E, SE • Lite nysnø siste døgn, begrensa flakdannelse.

Avalanche Problems

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • Easy to trigger • 2 - Medium • Some steep slopes NE, E, SE

Avalanche Problems

• Wet slab avalanche • Buried weak layer of faceted snow near the ground • 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 • 3 - Large • Few steep slopes N, NE, E, SE, S, SW, W, NW above 1000 masl

Avalanche Problems

• Buried weak layer of faceted snow near the ground • A big and identifiable crystal in the weak layer. • Very difficult to trigger • Some steep slopes N, NE, E, SE, S, SW, W, NW • Kantkornlaget ved har begynt å bli rundere. og er lite potent og vanskelig å løse ut. Den ligger under masse harde flak og skarelag og er for tiden vanskelig å påvirke.

• Dry slab avalanche • Buried weak layer of new snow • Within half a meter • Difficult to trigger • 2 - Medium • Few steep slopes NE, E, SE • Vi hadde bare 3 cm fokksnø der vi gravde så det var vanskelig å få resultat av lbt, men flaket viste motstand. Der det er mer innblåst snø kan nok faren for skred være høyere. Men det er lite snø for transport og flakene er ikke store.