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Avalanche warning for region Tromsø Tuesday 25.12.2018

Danger level 3 - Considerable avalanche danger

Published:
The snowpack is very unstable. Avoid areas with wind-deposited snow. It is also possible to trigger avalanches in a persistant weak layer in old snow found in bowls and gullies.

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 very 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
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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 24. December 2018

Det har snødd siden søndag morgen. Før nysnøen lå det mest snø i nordvendte leformasjoner etter vind fra stort sett sørlig retning den siste tiden. Snødekket var generelt hardt, men med mykere flak i beskyttede leformasjoner. Snødekket var ellers preget av skare opp til ca. 600-700 moh, i skogen har skaren begynt å smuldre noe opp. Det er generelt lite snø i terrenget.

Begynnende kantkorn rundt skarelag er observert på ca. 500 moh, både på Kvaløya og på fastlandet. Men dette er ikke nok utviklet, til å utgjøre et tydelig skredproblem enda.

Det er observert rimkrystaller på snøoverflaten mange steder.

Mountain weather

Monday 24. December 2018

4-8 mm precipitation. Breeze from west, changing to fresh breeze from the southwest during the evening. -9 °C to -2 °C at 700 m a.s.l. Partly cloudy.

Tuesday 25. December 2018

8 mm precipitation, up to 14 mm in the most exposed areas. Strong breeze from southeast, changing to strong breeze from the southwest Tuesday night. -7 °C to -2 °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

Mer nysnø og mer vind vil øke størrelsen på fokksnøansamlingene i nordvendte leformasjoner. Før nysnøen kom lå det masse rimkrystaller på overflaten. Der det dannes fokksnøflak over dette vedvarende svake laget, vil det bli svært utsabile forhold!
Avalanche danger scale Important information for ski touring
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