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Ski touring in Norway - important information | Varsom.no

Avalanche warning for region Trollheimen Sunday 25.02.2018

Danger level 2 - Moderate avalanche danger

Published:
Be aware that there can be pockets with persistent weak layer beneath wind deposited snow. Be careful in these areas, especially in and close to terrain traps.

Avalanche problems

Persistent weak layer (slab avalanches)

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

Buried weak layer of surface hoar

New snow (loose snow avalanches)

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

Loose 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 near surface
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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 24. February 2018

Det har lagt seg opp noko fersk fokksnø i nordleg leområde. I skjerma formasjonar ligg det omlag 10 cm laus ubunden snø. Det eldre snødekket er hardpakka av mykje vind i perioden før.

Kalde netter har gitt vekst av overflaterim og kantkorn på og i det eldre snødekket. Det kan ligge ustabile fokksnøflak på rimlaget i alle himmelretningar i høgda. Dette på tildels hardpakka og glatt overflate.
Det er og eit djupt kantkornlag danna 23.12.

Onsdag: fjernutløyst flakskred på svakt lag overflaterim (30cm djupn) (S for Gråhåmmåren). Påvirka djupt lag kantkorn (70cm djupn)

Mountain weather

Saturday 24. February 2018

2-4 mm precipitation. Calm/light breeze from southwest. -14 °C to -5 °C at 1400 m a.s.l. Partly cloudy.

Sunday 25. February 2018

10 mm precipitation, up to 20 mm in the most exposed areas. Breeze from north. -11 °C to -5 °C at 1400 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

Lokalt mykje nysnø under rolege vindforhold gjer at ein kan få laussnøskred i bratte sider i alle himmelretningar.
Nedføyka overflaterim og varierande vindretning har danna ustabile fokksnøflak i leformasjonar i alle himmelretningar. Desse kan fjernutløysast.
Det er svakt lag av kantkorn djupt i snødekket, men dette vil krevje stor tilleggsbelastning for å kunne påvirkast.
Avalanche danger scale Important information for ski touring
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