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Avalanche warning for region Vest-Telemark Saturday 17.02.2018

Danger level 3 - Considerable avalanche danger

Published:
Use great caution in areas with fresh windloaded snow. Persistant weak layers are present in the snow pack. Avalanches are triggered most easily where the snow pack is thin, typically close to ridges and on convex formations.

Avalanche problems

Wind drifted 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).

Buried weak layer of new snow

Persistent weak layer (slab avalanches)

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

Buried weak layer of faceted snow above a crust

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)

Friday 16. February 2018

Før uværet var det mye ubunden snø under skoggrensen, og snøen var jevnt fordelt i de fleste himmelretninger. I og omkring skoggrensen var det myke fokksnøflak, og i snaufjellet fokksnø med ulik hardhet. Rygger og oppstikkende terreng er for det meste avblåst.

Snødekket er sammensatt med flere vedvarende svake lag. Det er observert både nedsnødd rim og kantkorn over skarelag. Det varierer hvor mye som skal til for å påvirke disse lagene på grunn av stor variasjon i mektighet og fasthet av overliggende snø.

Det var kraftig snøfokk i høyfjellet torsdag, og vind av storm styrke. Det meldes fredag om at fokksnø har begynt å stabilisere seg. På Haukeli ble det rapportert om 15 cm nysnø fredag.

Mountain weather

Friday 16. February 2018

3-6 mm precipitation. Breeze from southeast, changing to fresh breeze from the west during the afternoon. -10 °C to -4 °C at 1400 m a.s.l. Cloudy.

Saturday 17. February 2018

2-4 mm precipitation. Breeze from southwest, changing to fresh breeze from the south during the evening. -12 °C to -4 °C at 1400 m a.s.l. Partly 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

Fokksnøen vil gradvis stabiliseres, men det vil fortsatt ta litt tid. I noen heng kan fokksnøflakene fortsatt være ustabile, og skred som løsner kan bli middels store (str 3). Stedvis har vinden dannet flak også under skoggrensa. Vedvarende svake lag kan påvirkes der snødekket er tynt eller mykt.
Avalanche danger scale Important information for ski touring
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