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Avalanche Forecast

Archived

Dec 30th, 2024–Dec 31st, 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

South Coast Inland, Birkenhead, Duffey, South Chilcotin, Stein, Taseko.

Head to sheltered terrain for the best riding conditions, wind slabs remain reactive to riders.

Monitor surface conditions as you gain elevation and move into wind affected terrain.

Confidence

Moderate

Avalanche Summary

Wind affected snow continues to be reactive to rider traffic. Recent avalanches reported have not involved the crust buried up to 100 cm deep.

Slab avalanches were triggered in the alpine on north facing slopes on Sunday, with wide propagation in steep ridgeline features. See photos below and it's worth checking out this great MIN report from Matier on Sunday for full details and more photos. Thanks for sharing.

Snowpack Summary

Wind affected snow sits above a crust which is found up to 1900 m.

Another crust is buried 60 to 100 cm deep, and in sheltered terrain a layer of surface hoar may exist just above it. There is uncertainty over its reactivity. It is more likely to be a concern in wind affected, thin and rocky start zones at higher elevations.

Snow depths at treeline vary between 90 to 160 cm.

Weather Summary

Monday NightMostly clear skies. 10 to 20 km/h southwest ridgetop wind. Treeline temperature -10 °C.

Tuesday

A mix of sun and cloud. 20 km/h southwest ridgetop wind. Treeline temperature -8 °C.

Wednesday

Mostly clear skies. 10 to 20 km/h west ridgetop wind. Treeline temperature -8 °C.

Thursday

A mix of sun and cloud. 20 to 40 km/h west ridgetop wind. Treeline temperature -6 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Seek out sheltered terrain where new snow hasn't been affected by wind.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.

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.