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Avalanche Forecast

Archived

Apr 13th, 2023–Apr 14th, 2023

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, 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, human triggered possible.

Regions

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

Use extra caution in wind effected terrain, especially on large slopes or slopes with overhead hazard. Several remotely triggered avalanches have been reported in the past few days.

Confidence

Moderate

Avalanche Summary

During the week several remotely triggered storm and wind slabs have been reported. these avalanches typically occurred between 2000 and 2300 m and on a variety of aspects. A layer of facets and/or a crust down around 60 cm is likely responsible. Check out this MIN for an example of these avalanches.

Snowpack Summary

The alpine is variably wind effected. Dry snow can still be found on sheltered north aspects at treeline and above. A crust exists on or near the surface on all other terrain.

A layer of facets and a crust from early April can be found down up to 60 cm at treeline and above.

The base of the snowpack remains faceted and weak. Avalanche activity has not been observed on this layer recently but concern remains for shallow rocky snowpack areas.

Weather Summary

Thursday Night

Partly clear with the possibility of light flurries bringing trace amounts of new snow. Light northwest winds and a low of -9°C at 1800 m.

Friday

A mix of sun and cloud with no new snow expected. Light variable winds and freezing levels rising to 1800 m.

Saturday

Cloudy in the afternoon with up to 5 cm of new snow possible. Strong southerly winds and freezing level rising to 1600 m with the snowline around 1300 m.

Sunday

Stormy with up to 15 cm of new snow expected. Moderate southerly winds and freezing levels rising to 1500 m. Snowline around 1100 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Be especially cautious as you transition into wind affected terrain.
  • Minimize your exposure time below cornices.
  • Remote triggering is a concern, watch out for adjacent and overhead slopes.

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.