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Avalanche Forecast

Archived

Feb 23rd, 2023–Feb 24th, 2023

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

Regions

South Coast, North Shore, Sasquatch, Tetrahedron.

Watch for isolated pockets of stiff wind slab as you transition into exposed terrain.

A surface crust will make for challenging travel conditions, but generally safe avalanche conditions.

Confidence

High

Avalanche Summary

There are no new avalanches to report in the past few days.

Snowpack Summary

New snow at upper elevations from early in the week has accumulated over a variety of old surfaces including wind slabs in the alpine and a breakable freezing rain crust between 1100 m and 1600 m.

The mid and lower snowpack is well-settled, strong, and consolidated.

Snowpack depths are reaching 250 cm at treeline.

Weather Summary

Thursday night

Clear. Alpine temperatures drop to a low of -12 °C. Ridge wind northeast 25 km/h. Freezing level at valley bottom.

Friday

Sunny with cloudy periods. Alpine temperatures reach a high of -9 °C. Ridge wind northwest 10 km/h. Freezing level at valley bottom.

Saturday

Cloudy with snowfall in the afternoon, 5-10 cm of accumulation. Alpine temperatures reach a high of -6 °C. Ridge wind south 20 km/h gusting to 45 km/h. Freezing level 100 meters.

Sunday

Cloudy with snowfall, heavy at times, 15-25 cm of accumulation. Alpine temperatures reach a high of -3 °C. Ridge wind southwest 30-45 km/h. Freezing level 600 meters.

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.
  • A crust on the surface will help bind the snow together, but may make for tough travel conditions.

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.