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Avalanche Forecast

Archived

Feb 6th, 2025–Feb 7th, 2025

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

Regions

Glacier.

Dig down and look for the buried persistent layer before committing to consequential terrain.

It's still cold out! be sure to pack extra layers in case of emergency.

Confidence

Moderate

Avalanche Summary

Natural avalanche activity has eased.

Neighboring operations are reporting rider & remote triggered avalanches on the Jan 30th layer.

A sz 2 wind slab was triggered by a skier part way down Forever Young, resulting in injuries.

A sz 1.5 wind slab on the Ravens was observed while flying to the above accident.

Snowpack Summary

Funky variable winds have caused widespread wind effect. This wind effect is most prominent in the alpine & treeline but does exist BTL in areas affected by localised valley winds.

20-40cms of recent storm snow has buried a weak layer of surface hoar, facets and/or suncrust (Jan 30).

The midpack is either firm, wind pressed surfaces or low density sugary snow in sheltered areas.

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

Weather Summary

Continuing cold as the arctic ridge persists.

Tonight Clear with cloudy periods. Alpine low -16°C. Ridge wind E 15km/hr.

Fri A mix of sun & cloud. Alpine high -14°C. Ridge wind: SW 10-20km/hr. Freezing Level at valley bottom.

Sat Cloud & sun with isolated flurries. Alpine high -15°C. Ridge wind W-20-30km/h.

Sun A mix of sun & cloud with flurries. Alpine high -18°C. Ridge wind NW 15-25km/h.

Terrain and Travel Advice

  • Make conservative terrain choices and avoid overhead hazard.
  • Be aware of the potential for remote triggering and large avalanches due to buried surface hoar.

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.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.