Avalanche warning for region Lyngen Saturday 23.02.2019

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. • Easy to trigger • Likely • 1 - Small • Some steep slopes N, NE, E between 800 masl and 400 masl • Vil stabiliseres med mer mildvær og regn.

• 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. • Very difficult to trigger • Unlikely • 3 - Large • Many steep slopes N, NE, E, SE, S, SW, W, NW between 1000 masl and 300 masl

• Wet slab avalanche • Water pooling in/above snow layers • Within half a meter • The collapsing weak layer is thin < 3 cm. • Spontaneous release • Likely • 2 - Medium • Many steep slopes N, NE, E, SE, S, SW, W, NW above 300 masl • Vann har ikke nådd ned i snødekket enda, men det er varslet mer regn.

Avalanche Problems

• Wet slab avalanche • Water pooling in/above snow layers • Within half a meter • Difficult to trigger • 3 - Large • Some steep slopes N, NE, E, SE, S, SW, W, NW above 400 masl

• 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 • 4 - Very large • Some steep slopes N, NE, E, SE, S, SW, W, NW above 400 masl

Avalanche Problems

• 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 • Unlikely • 3 - Large • E, SE, S, SW above 1000 masl • Så lenge man ferdes der snødekket er tykt vil man ikke klare å påvirke laget.

• Dry slab avalanche • Poor bonding between layers in wind deposited 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 • Possible • 1 - Small • Some steep slopes E, SE, S, SW above 0 masl • Sjiktoverganger som ikke ennå er helt stabile kan man løse ut. Trolig lokalt alt etter hvordan vinden har slått.

• 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 • Possible • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW, W, NW between unknown masl and 300 masl • Spesielt på konvekser i leheng ned mot tregrensen drønner det godt i dekket. Trolig må det være bratt og mye spenning for å få utløst slred

Avalanche Problems

• Dry slab avalanche • Buried weak layer of faceted snow above a crust • Within half a meter • Difficult to trigger • 4 - Very large • Many steep slopes N, NE, E, SE, S, SW, W above 700 masl • Et meget stort drønn (i hele dalen) på dette laget. 12 cm tykt lag av delvis omvandlet snø på islaget fra siste mildvær. 0-50 cm fokksnø/løssnø oppå dette.

• Dry slab avalanche • Buried weak layer of faceted snow beneath a crust • Within half a meter • The collapsing weak layer is thin < 3 cm. • Difficult to trigger • 2 - Medium • Some steep slopes N, NE, E, SE, S, SW between 700 masl and 300 masl • Ikke utviklet kantkorn.