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Avalanche Forecast

Archived

Jan 11th, 2025–Jan 12th, 2025

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

Stay off wind-loaded slopes and be mindful of overhead hazard, especially during periods of strong sun.

Confidence

Moderate

Snowpack Summary

10 to 30 cm of new snow arrived Friday night with strong southeast switching to northwest wind creating wind-affected surfaces and wind slabs on a variety of aspects in exposed terrain.

This new snow overlies a sun crust on steep south-facing slopes, faceted snow or large surface hoar in sheltered areas, and wind-affected surfaces in exposed areas.

A second crust is buried 60 to 100 cm deep and may have a layer of surface hoar sitting above it. Recent tests show this layer as unreactive.

The remainder of the mid and lower snowpack is well-settled.

Snow depths at treeline are roughly 100 to 150 cm.

Weather Summary

Saturday Night

Mostly clear with lingering valley cloud. 15 to 30 km/h northwest ridgetop wind. Treeline temperature -6 °C.

Sunday

A mix of sun and cloud. 15 to 30 km/h northeast ridgetop wind. Treeline temperature -6 °C.

Monday

A mix of sun and cloud. 30 to 50 km/h northwest ridgetop wind. Treeline temperature 0 °C. Freezing level rising to 2500 m.

Tuesday

A mix of sun and cloud. 15 to 40 km/h west ridgetop wind. Treeline temperature 0 °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.
  • Be aware of the potential for large avalanches due to buried surface hoar.
  • Limit exposure to steep, sun exposed slopes, especially when the solar radiation is strong.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

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.