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Archived

Avalanche Forecast

Feb 12th, 2024–Feb 13th, 2024
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Use extra caution on steep slopes at treeline.

Buried surface hoar has been reactive to skiers and even produced remotely triggered avalanches.

Confidence

Moderate

Avalanche Summary

Over the weekend several human triggered avalanches up to size 1.5 were reported, these avalanches all failed on the surface hoar and facet layer described in the snowpack summary. Most of these avalanches were at treeline with a few being triggered in the alpine.

Remotely triggered avalanches have also been reported like the one in this MIN.

Snowpack Summary

Up to 20 cm of recent storm snow has been redistributed into wind slabs by westerly winds. In sheltered terrain this snow overlies a layer of surface hoar and facets. A new crust may be found on steep south facing slopes.

Below this is a thick and hard melt-freeze crust extending up to approximately 1700 m. This crust is just buried by the 10 to 20 cm of new snow at lower elevations.

Weather Summary

Monday Night

Mostly clear with trace amounts of new snow possible, north alpine wind 25 to 50 km/h, temperature inversion with -1°C at 1500 m and colder temperatures below.

Tuesday

Clear skies  with no new snow expected, northeast alpine wind 15 to 30 km/h, treeline temperature -1°C.

Wednesday

Clear skies with no new snow expected, northeast alpine wind 20 to 40 km/h, treeline temperature -4°C.

Thursday

Clear skies with no new snow expected, northeast alpine wind 40 to 70 km/h, treeline temperature -4°C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully assess open slopes and convex rolls where buried surface hoar may be preserved.
  • Be carefull around freshly wind loaded features.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

Avalanche Problems

Persistent Slabs

A layer of surface hoar and facets in the upper snowpack will likely remain rider triggerable. This layer is most problematic in sheltered terrain at treeline.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Possible - Likely

Expected Size: 1 - 2

Wind Slabs

Westerly winds have formed wind slab in the alpine and treeline.

Aspects: North, North East, East, South East, North West.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2