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Avalanche Forecast

Archived

Jan 1st, 2025–Jan 2nd, 2025

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.
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.

Carefully assess for reactive wind slabs and blowing snow before committing to steep slopes at higher elevations.

Confidence

Moderate

Avalanche Summary

A size 2 wind slab avalanche was reported on Tuesday in the Duffey area. It was triggered from a deeper, loaded pocket near a ridgetop on a northerly aspect. Check out the MIN report here.

Snowpack Summary

Generally low-density snow on the surface with minimal wind effect in all but exposed alpine terrain.

A thin crust exists in the upper snowpack, up to 1900 m, particularly in sun-affected terrain.

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 are roughly 100 to 150 cm.

Weather Summary

Wednesday Night

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

Thursday

Mostly cloudy with 0 to 2 cm of snow. 20 to 30 km/h southwest ridgetop wind. Treeline temperature -7 °C.

Friday

Mostly cloudy with 0 to 2 cm of snow. 20 to 30 km/h southeast ridgetop wind. Treeline temperature -7 °C.

Saturday

Mostly cloudy with 0 to 2 cm of snow. 30 to 40 km/h southwest ridgetop wind. Treeline temperature -7 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Pay attention to isolated wind affected features in the alpine, as well as cross-loaded features at treeline.
  • Pay attention to the wind; once it starts to blow, sensitive wind slabs are likely to form.
  • Keep in mind a buried crust offers an excellent bed surface for 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.