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Avalanche Forecast

Archived

Feb 14th, 2023–Feb 15th, 2023

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, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

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

Avalanches are possible in wind-loaded areas at treeline and above. Winds have changed directions and built wind slabs on all aspects. Carefully evaluate wind loading as you move through terrain and investigate the bond of wind slabs to the crust below them before committing to a slope.

Confidence

High

Avalanche Summary

On Monday afternoon, search and rescue technicians responded to a fatal avalanche incident north of the Sea to Sky region. The avalanche is believed to have occurred on Saturday and was initiated in a shallow rocky area. See the MIN for more details.

A skier remote triggered, size 2 avalanche was reported on a cross-loaded morainal feature. The group reported the avalanche as a soft wind slab over a crust. The slope fractured 30 m above the group. See the MIN for more information.

A few small skier accidental storm slabs were reported, up to size 1. A few size 1 loose dry avalanches were observed in steep rocky terrain.

Please continue to share any observations or photos on the Mountain Information Network.

Snowpack Summary

10-20 cm of recent storm snow overlies wind-affected surfaces at higher elevations and a crust at lower elevations. On solar steep slopes, a new sun crust has formed on the surface.

A melt-freeze crust from late January is found down 60-80 cm. At the moment this layer appears to be gaining strength though in isolated areas small facets are still found surrounding the crust.

The snowpack in this region is generally weak and shallow with sugary snow near the base. Avoid areas where snowpack depth varies rapidly like thin rocky start zones. Snowpack depths around treeline range between 150 to 250 cm.

Weather Summary

Tuesday Night

Clear skies. Winds north switching to the west 10 to 15 km/h. Treeline temperature -10 °C. Freezing levels drop to valley bottom.

Wednesday

Mainly sunny with clouds increasing in the afternoon. Winds west 10 to 25 km/h. Treeline temperature -7 °C. Freezing level 600 m.

Thursday

Cloudy with sunny periods and isolated flurries, trace accumulation. Winds southwest 25 km/h gusting to 40 km/h. Treeline temperature -10 °C. Freezing level 800 m.

Overnight flurries bring 2-3 cm accumulation.

Friday

Cloudy with isolated flurries, 2 cm accumulation. Winds west 25 km/h. Treeline temperature -9 °C. Freezing level 1000 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Approach lee and cross-loaded slopes with caution.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

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.