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Ski touring in Norway - important information | Varsom.no

Avalanche warning for region Hallingdal Saturday 07.03.2020

Danger level 2 - Moderate avalanche danger

Published:
Be careful in lee areas with wind deposited snow, typically behind ridges, ribs and in gullies. Especially where the wind deposited slabs are thin or soft, a slab avalanche is easier to trigger here.

Avalanche problems

Wind drifted snow (slab avalanches)

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

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 6. March 2020

Under tregrensen ligger det mye tørr ubunden snø. Høyere opp er snødekket mer vindpåvirket, og hardheten på flakene øker med høyden. Stedvis ligger det svake lag med nysnø under fokksnøen, men tidligere tester viser liten bruddforplantning i denne fokksnøen.
Der vinden har kommet godt til, er det avblåst ned til gammel skare.

Fredag er det meldt om drønn etter brudd i kantkorn i tynt snødekke på 1100 moh i N-vendt fjellside ved Hol. Bruddet skjedde i mykt flak og ga liten bruddforplantning.

Mountain weather

Friday 6. March 2020

No precipitation. -14 °C to -8 °C at 1400 m a.s.l. Partly cloudy.

Saturday 7. March 2020

No precipitation. Breeze from south. -14 °C to -7 °C at 1400 m a.s.l. Clear skies.

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

Rolig vind og oppholdsvær gir liten endring i skredfaren. Vær oppmerksom der det ligger myke/tynne fokksnøflak. Det forventes at det skal stor tilleggsbelastning til for å løse ut skred i eldre fokksnø. Nattekulde og stor temperaturgradient fremmer vekst av overflaterim og kantkorn nede i snødekket. Dette kan gi vedvarende svakt lag som kan påvirkes av en skiløper der snødekket er tynt.
Avalanche danger scale Important information for ski touring
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