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Avalanche Forecast

Archived

Mar 14th, 2025–Mar 15th, 2025

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

Regions

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

An abundance of recent storm snow sitting on dangerous persistent weak layers makes for a complex snowpack.

Keep it simple. Enjoy the fresh powder in low-angled, low-consequence terrain.

Confidence

Moderate

Avalanche Summary

With continuous storm cycles in the past week, numerous natural and human-triggered (some remotely-triggered) storm slab and persistent slab avalanches have been reported throughout the region. These avalanches have predominantly failed in north-facing alpine and treeline terrain.

Snowpack Summary

An additional 5 cm is expected on Saturday, which will bring this week's storm totals to 80 to 150 cm of new snow. This sits on a weak layer formed in early March that consists of facets or surface hoar that overlie a crust on all aspects except high north-facing slopes.

Weak layers formed in mid-February and late-January are now buried 80 to 175 cm deep.

Weather Summary

Friday Night

Cloudy with clear periods. 5 to 15 km/h southeast ridgetop wind. Treeline temperature -7 °C. Freezing level 900 m.

Saturday

Cloudy with up to 5 cm of new snow. 15 to 50 km/h south ridgetop wind. Treeline temperature -4 C. Freezing level 1000 m.

Sunday

A mix of sun and cloud with isolated flurries. 15 to 30 km/h southwest ridgetop wind. Treeline temperature -7 °C. Freezing level 1100 m.

Monday

A mix of sun and cloud with isolated flurries. 20 to 40 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level rising to 1200 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Keep your guard up as storm slabs may remain sensitive to human triggering.
  • Be aware of the potential for large avalanches due to buried weak layers.
  • Choose gentle slopes that have limited consequence.
  • Storm slabs in motion may step down to deeper layers resulting in large avalanches.
  • Cornice failures could trigger large and destructive avalanches.

Problems

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.