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Avalanche Forecast

Archived

Nov 28th, 2022–Nov 29th, 2022

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

Regions

Northwest Coastal, Kitimat, Nass, Rupert, Seven Sisters, Shames, Stewart, Howson, Ningunsaw.

Recent winds have shifted to the east and may form fresh wind slabs on aspects that are generally windward.

Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.

Confidence

Moderate

Avalanche Summary

No new avalanches were reported in this region on Sunday.

Snowpack and avalanche observation data are currently very limited in this region. Please consider posting your observations to the MIN. (Mountain Information Network)

Snowpack Summary

Recent winds have shifted to the east and may form fresh wind slabs on aspects that are generally windward.

Last week's storm that delivered 70-150 cm of snow and strong southwest ridgetop winds created thick wind slabs on lee aspects at treeline and above.

The recent snow overlies a variety of problematic snow surfaces including facets and crusts.

The depth of the snowpack at treeline varies widely from 100-200 cm and tapers rapidly below treeline.

Many early-season hazards such as rocks, stumps, and open creeks exist below treeline.

Weather Summary

Monday Night

Partly cloudy / Light east ridgetop winds / Low temperature at treeline -18 C

Tuesday

Mix of sun and cloud / Moderate east ridgetop winds / High temperature at treeline -14 C

Wednesday

Sunny / Strong northeast ridgetop winds / High temperature at treeline -16 C

Thursday

Increasing cloudiness / Light north ridgetop winds / High temperature at treeline -17 C

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Use ridges or ribs to avoid areas of wind loaded snow.

Problems

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.