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Ski touring in Norway - important information | Varsom.no

Avalanche warning for region Trollheimen Tuesday 05.12.2017

Danger level 3 - Considerable avalanche danger

Published:
Complex situation with heavy snowfall at high altitudes, wet snow in the lowlands and presence of weak layers of buried surface hoar in the snow pack. Use experience and knowledge in backcountry activities!

Avalanche problems

New snow (slab avalanches)

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

Buried weak layer of new snow

Persistent weak layer (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). Remote triggering is possible.

Buried weak layer of surface hoar

Wet snow (loose snow avalanches)

You can easily trigger avalanches on some steep slopes. Avalanches are relatively harmless to people, but can knock you off balance. Can be dangerous close to terrain traps. (size 1)

Loose snow
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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)

Monday 4. December 2017

Snødekket har blitt påvirket av mildvær i flere omganger, senest 02.des., men påfølgende snøvær søndag og mandag gir i hovedsak mykje laus snø og mjuk overflate. Kun rygger og utsatte stader er avblåst.

Rundt skarelag nede i snødekket er kantkorndannelse i gang. Foreløpig ikke tatt med som et skredproblem, men det må følges med på.

Det er ikke rapportert om nevneverdig skredaktivitet siste dager.

Snøgrensa er mandag ved havnivå, betydelig meir snø i ytre del.

Mountain weather

Monday 4. December 2017

12 mm precipitation, up to 20 mm in the most exposed areas. Fresh breeze from northwest. -9 °C to -4 °C at 1400 m a.s.l. Cloudy.

Tuesday 5. December 2017

15 mm precipitation, up to 30 mm in the most exposed areas. Strong breeze from northwest, changing to breeze from the west during renoon. -9 °C to -1 °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

Kraftig vind og nedbør over tid gir store mengder snø i leområder. Over mildværsgrensa er det lett å løse ut nysnøflak, og i dei høgaste og mest vindskjerma områda kan nysnøflaka ligge på nedsnødd overflaterim frå før helga. Under mildværsgrensa vil nedbør som regn gi problem med våte skred. Det er forhold for naturlig utløste skred både over og under mildværsgrensa. Faregraden blir vurdert til 3-betydelig.
Avalanche danger scale Important information for ski touring
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