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Avalanche Forecast

Archived

Nov 29th, 2024–Nov 30th, 2024

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.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Watch out for fresh wind slab in the alpine, winds are forecast to increase through the storm.

There is uncertainty in the forecast snowfall amounts. If you're finding more than 20cms of snow accumulation avalanche danger will be higher than forecast!

Confidence

Moderate

Avalanche Summary

Recent Loose dry avalanches have been observed in the Park. The steep North face of Mt Macdonald has been shedding some of the new snow, producing size 2's just reaching the top of run outs.

Rider triggered sluffing has been noted in recent MIN reports aswell.

Snowpack Summary

Light, fluffy new snow has buried a variety of old snow 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 weekend

Tonight: Flurries 6cms, Alp Low -11 °C. SW winds 30km/hr. Freezing Level (FZL): 600m

Sat: 6 cm. Alp High -8 °C. Light to Mod SW winds. FZL: 1000m

Sun: Mix of sun/cloud. Trace precip. Alp High -4 °C. Light SW winds. FZL: 100m

Mon: Cloudy with sunny periods. 0 cms new snow, Alp High -1 °C. Light W winds. FZL: 1300m

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind-affected terrain.
  • 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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.