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Avalanche Forecast

Archived

Mar 27th, 2023–Mar 28th, 2023

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

Regions

South Coast, Powell River, Tantalus, North Shore, Sasquatch, Sasquatch, Sky Pilot, Tetrahedron.

Continue to make good terrain and travel decisions.

Heads up when transitioning into wind-affected terrain on all aspects.

Confidence

High

Avalanche Summary

On Saturday, several rider triggered dry loose avalanches up to size 1 on steep treeline and alpine features. A few small natural and skier triggered wind slab avalanches were reported at treeline where the wind had built more cohesive pockets of snow.

If you head out in the backcountry, let us know what you are seeing by submitting a report to the Mountain Information Network.

Snowpack Summary

At higher elevations, light southwest winds may have transported the 15 to 30 cm of recent snow and formed small wind slabs. Incoming moderate to strong easterly winds may develop new wind slabs where they typically do not occur.

Below the recent snow is a melt-freeze crust, existing on all aspects at treeline and below. The crust extends to mountain tops on sunny aspects. In north-facing high alpine terrain, the surface snow may have remained cold and dry.

The mid and lower snowpack is generally well-settled and strong.

If you are a visual learner click here for a video describing the snowpack.

Weather Summary

Monday Night

Clear, no accumulation, winds easterly 30 km/h ramping up to 55, freezing level 1400 m.

Tuesday

Sunny, no accumulation, winds easterly 30 to 50 km/h, freezing level reaching 1700 m.

Wednesday

Sunny with increasing clouds in the afternoon, no accumulation, winds east to northeast 20 to 30 km/h, freeing levels 1700 m.

Thursday

A mix of sun and cloud, trace accumulation at higher elevations, winds 10 to 15 km/h, freezing levels 1500 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid exposure to slopes that have cornices overhead.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.

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.