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Avalanche Forecast

Archived

Feb 13th, 2025–Feb 14th, 2025

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Watch for sluffing of loose, dry snow in steep terrain.

The persistent slab problem is most reactive where a cohesive slab sits on top of a crust.

Confidence

High

Avalanche Summary

We have observed size 1 dry loose natural and rider triggered avalanches in steep unsupported terrain this week.

Field teams and MIN reports have observed some whumping and cracking of the surface wind slab.

Neighbouring operations, particularly to the west, are still reporting rider & remote triggered avalanches on the Jan 30th layer.

Snowpack Summary

Areas sheltered from the wind are faceted with good quality skiing.

A weak layer of surface hoar, facets and/or suncrust (Jan 30th drought layer) is 30-50cm down from the snow surface. Recently, this layer is most reactive where a crust exists on solar facing terrain.

The Jan 7th layer is down 50-80cm, and is comprised of surface hoar in sheltered areas and/or a thin crust on steep S aspects.

Weather Summary

Warmer, benign weather is forecast through the weekend.

Tonight Clear periods. Alpine temperature low -11°C. Ridge wind SE-15 km/hr.

Friday Cloudy. Alpine high -10 °C. Ridge wind W 10 km/hr.

Sat Cloudy/isolated flurries. Alpine high -14°C. Wind SW 10m/hr.

Sun Cloudy/isolated flurries. Alpine high -10°C Wind S 10 km/hr.

Terrain and Travel Advice

  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.
  • Back off if you encounter whumpfing, hollow sounds, or shooting cracks.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.