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Ski touring in Norway - important information | Varsom.no

Avalanche warning for region Sør-Troms Sunday 21.04.2019

Danger level 3 - Considerable avalanche danger

Published:
A very complex situation is at hand. Rain will weaken the snowpack below treeline. In the alpine new snow and strong winds will form unstable wind slabs. The old persistent weak layer may still be triggered after being weakened by the last days raining event.

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).

Poor bonding between layers in wind deposited snow

Wet snow (loose snow avalanches)

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

Loose snow

Wet snow (slab avalanches)

You can easily 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 20. April 2019

Fredag tok mildværet skikkelig tak i snødekket. Fukten har trengt langt ned og det meste av lagdelinger er fuktet, også de gamle vedvarende svake lag.

Mildværet gikk høyt til fjells de første dagene av påsken.

Fra slutten av februar har vi et vedvarende svakt lag av kantkorn dypt i snødekket. Laget er trolig mest utbredt over min. 600 moh.

Mildværet fredag forventes også å ha gitt skredaktivitet, men dette er ikke bekreftet ennå pga. dårlig sikt.

Mountain weather

Saturday 20. April 2019

3 mm precipitation, up to 10 mm in the most exposed areas. Strong breeze from southwest. 1 °C to 6 °C at 700 m a.s.l. Partly cloudy.

Sunday 21. April 2019

8 mm precipitation, up to 15 mm in the most exposed areas. Strong breeze from southwest. -1 °C to 3 °C at 700 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

En ny runde med voksne mengder nedbør svekker snødekket i lavlandet og gir pålagring av nysnø i høyfjellet.

I lavlandet ventes det naturlig utløste våte skred pga. regn.

Over mildværsgrensen kan det danne seg ustabile fokksnøflak i leområder.

Det kan fortsatt være fare for enkelte naturlig utløste skred i kantkornlaget fra februar. Fukten etter mildværet vil etterhvert trenge ned til dette laget.
Avalanche danger scale Important information for ski touring
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