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Avalanche warning for region Indre Troms Sunday 29.12.2019

Danger level 3 - Considerable avalanche danger

Published:
Strong winds, precipitation and high temperatures gives unstable snow conditions. Naturally released wet and dry slab avalanches are possible. A persistent weak layer is present in the region but is mainly difficult to trigger.

Avalanche problems

Wet snow (slab avalanches)

You can easily trigger avalanches on some steep slopes. Avalanches can get large enough to bury a car or destroy a small house (size 3).

Water pooling in/above snow layers

Wind drifted snow (slab avalanches)

You can easily trigger avalanches on some steep slopes. Avalanches can get large enough to bury or even kill you (size 2).

Poor bonding between layers in wind deposited snow

Persistent weak layer (slab avalanches)

You can trigger avalanches on a few steep slopes. Avalanches can get large enough to bury a car or destroy a small house (size 3).

Buried weak layer of faceted snow above a crust
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Below you can see a description of the current snow cover information and current weather forecast in the mountains. If your observations deviate greatly from what is described here, the warning will not necessarily apply either. Always make your own judgments or stay away from avalanche terrain.

Snow cover (in Norwegian)

Saturday 28. December 2019

Over tregrensa er det varierende snøoverflate etter perioder med kraftig vind.

Under gamle fokksnøflak finnes stedvis svakt lag av kantkorn. Dette ligger vekselvis under, over og mellom porøse skarelag. Stabilitetstester viser at laget under skaren kollapser lett, men siden skarelaget de fleste stedene er hardt og tykt er det stort sett vanskelig å påvirke det. Kantkorn over skare er observert i nærheten av Bardufoss, men ikke i Tamokdalen.

Mountain weather

Saturday 28. December 2019

5 mm precipitation, up to 10 mm in the most exposed areas. Strong breeze from southwest, changing to gale from the southwest during the afternoon. -12 °C to -1 °C at 1100 m a.s.l. Cloudy.

Sunday 29. December 2019

20 mm precipitation, up to 35 mm in the most exposed areas. Gale from west, changing to fresh breeze from the southwest during the afternoon. -6 °C to 0 °C at 1100 m a.s.l. Cloudy.

Advice

The bulletin is a planning tool and may differ from the actual situation. Always make your own evaluation. To be 100 % avalanche safe, avoid all avalanche terrain.

Avalanche risk assessment

Kraftig vind først på dagen i kombinasjon med nedbør ventes å gi ustabil fokksnø i leområder i høyden, og naturlig utløste skred kan forekomme. Det ventes mildvær og regn opp til ca 600 moh, noe som kan gi naturlig utløste våte skred i lavlandet. Om ettermiddagen roer været seg noe, men seint om kvelden vil et nytt lavtrykk gi ny runde med kraftig vind og regn.

Vær oppmerksom på at eldre fokksnøflak noen steder kan ligge over et vedvarende svakt lag av kantkorn. Det virker nå lite sannsynlig å løse ut skred i dette laget, men evt skred kan bli store.
Avalanche danger scale Important information for ski touring
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