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Avalanche Forecast

Archived

Nov 27th, 2024–Nov 28th, 2024

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

Glacier.

Be on the lookout for isolated pockets of wind slab in leeward features and near ridgetop in the Alpine.

Dry loose avalanches are possible in steep terrain as fluffy new snow accumulating.

Trails returning to parking lots have become icy with lots of early season hazards like rocks and stumps at lower elevations.

Confidence

No Rating

Avalanche Summary

Isolated, small avalanches have been observed in the past few days, see MIN from Connaught Valley on Tuesday.

On Nov 25 there was a report of a small, human-triggered avalanche on Macdonald West Shoulder.

Snowpack Summary

Flurries bringing light, fluffy new snow will start to bury a variety of surfaces throughout the park. These include: wind effected snow in higher Alpine areas and settled storm snow in sheltered terrain.

The Nov 9 crust is down 50-100cm and unreactive in recent snowpack tests. The base of the snowpack is comprised of several dense, melt-freeze rain crusts formed in October.

Treeline snowpack depths average 110-130cm.

Weather Summary

Northwesterly weather flow will bring cold temps, flurries are forecast to continue through the Sat.

Tonight: Flurries, trace amounts, Alp Low -11 °C. Light to mod SW winds.

Thurs: Flurries, trace amounts, Alp High -9 °C. Light SW winds.

Fri: Flurries, 5 cm snow. Alp High -9 °C. Light to Mod SW winds.

Sat: Flurries, 5 cm snow. Alp High -8 °C. Light to Mod SW winds.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

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.