Avalanche bulletin - Tröllaskagi

  • Thu Feb 29

    Moderate danger
  • Fri Mar 01

    Moderate danger
  • Sat Mar 02

    Moderate danger

New snow in light winds on Tuesday, followed by several avalanches. The thaw on Monday affected the snowpack up to the mountain peaks, but stiffened and strengthened as it froze again on Tuesday.

The avalanche bulletin is at a regional scale. It does not necessarily represent avalanche danger in urban areas.

Avalanche problems in the area

Wind slabs are widespread after NW snowfall on Tuesday. Snjógryfja showed a fracture at this layer.

Snow pit from 28.2. showed a persistant weakness is still present by the older firn layer in lower snowpack, especially in the upper elevations. It may be difficult to trigger avalanches on this layer since layers on top have been through freeze thaw cycles.

Snow layers and snow cover

Unstable wind slabs are present on south- and east-facing slopes after snowfall on Tuesday. Snow tests indicated fractures under light to moderate loads on the new snow. Thaw on Monday has influenced snow in all elevations, but has now stiffened and strengthened. A deep persistent weakness, beneath layered snow on older crust, is still present, although stability tests last weekend showed fractures under moderate to heavy loads on that layer. Propagation saw tests indicated that the layer fractures easily, and faceted crystals are still present although starting to round. It will likely require significant stress for avalanches to release on that layer, as the upper layers have stiffened and bridged the lower layers.

Recent avalanches

Two avalanches released in Illviðrishnjúkur following snowfall on Tuesday, sized between 2 and 2.5. Several small slabs also fell in the area, along with small slabs in Ólafsfjörður. There was considerable avalanche activity in the region before the weekend and during the thaw on Monday. A slab avalanche was reported in Klaufabrekkuskarð, sized 2.5.

Weather forecast

Calm weather, cold, and light precipitation expected across the country on Thursday, with minimal snowfall. Light northerly winds on Thursday. Stronger N-winds on Friday.

Forecast made: 28 Feb 16:54 GMT. Valid until: 29 Feb 19:00 GMT.

Avalanche Danger Scale

Very high
High
Considerable
Moderate
Low

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About the bulletin

IMO issues an avalanche bulletin Monday, Wedenesday and Friday at 16:00 GMT for three selected areas.

Safe backcountry travel requires training and experience. You control your own risk by choosing where, when and how you travel.

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