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Avalanche Forecast

Archived

Feb 15th, 2023–Feb 16th, 2023

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

Regions

South Coast, North Shore, Sasquatch, Sky Pilot, Tetrahedron.

Avalanches are possible on wind-loaded features in the alpine. Continually assess conditions as they change through the day. Carefully evaluate wind loading as you move through the terrain and investigate the bond of wind slabs to the crust below.

Confidence

High

Avalanche Summary

There have been no new avalanches reported in the region for a week. Backcountry users should evidence of small point releases in steep rocky areas likely caused by strong solar radiation Tuesday.

Snowpack Summary

Flurries through the day accumulate over a variety of surfaces including thin wind slabs in the alpine, small surface hoar in sheltered areas and a breakable freezing rain crust between 1100 m and 1600 m, possibly higher.

A hard crust is found 60 to 80 cm deep. Below this, the mid and lower snowpack is strong and consolidated.

Snowpack depths are reaching 230 cm at treeline.

Weather Summary

Wednesday Night 

Partly cloudy. Winds southwest 20 km/h gusting 40 km/h. Treeline temperatures -6 °C and freezing levels 600 m. 

Thursday

Mainly cloudy with isolated flurries, 5 mm accumulation. Winds southwest 20 km/h gusting 40 km/h. Treeline temperatures -5 °C and freezing levels 800 m. 

Overnight cloudy with flurries, 10-15 mm accumulation.

Friday

Cloudy with sunny periods and isolated flurries, trace accumulation. Winds west 20 km/h. Treeline temperatures -4 °C and freezing levels 800 m. 

Saturday

Mainly cloudy with isolated flurries, trace accumulation. Winds northwest 60 km/h. Treeline temperatures -4 °C and freezing levels 800 m. 

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Although their spatial distribution is isolated, wind slabs are reactive.
  • Carefully evaluate steep lines for wind slabs.
  • Wind slabs may be poorly bonded to the underlying crust.

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.