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Avalanche Forecast

Archived

Apr 13th, 2023–Apr 14th, 2023

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

Sea To Sky, Brandywine, Garibaldi, Homathko, Spearhead, Tantalus, Sky Pilot.

Keep an eye out for conditions that change with aspect, elevation, and time. The snow surface will vary throughout the terrain and will change as solar input does it's thing.

Confidence

Moderate

Avalanche Summary

On Wednesday a natural avalanche cycle occurred with storm and wind slab avalanches up to size 3. Check out this MIN from the Tantalus.

Numerous wet loose and dry loose avalanches were also observed in the region on Wednesday.

Snowpack Summary

A new crust can be found at or near the surface on all but high north facing terrain. The alpine is variably wind effected from moderate to strong northeast winds with previous southerly winds.

Several crusts can be found in the upper snowpack. A well settled snowpack exists below.

Weather Summary

Thursday Night

Partly cloudy 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 southerly winds and freezing levels rising to 1600 m.

Saturday

Cloudy with up to 10 cm of new snow expected. Strong southerly winds and freezing level rising to 1600 m with the snowline around 1300 m.

Sunday

Stormy with up to 20 cm of new snow expected. Moderate to strong 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 careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Be alert to conditions that change with aspect and elevation.
  • Minimize your exposure time below cornices.
  • As surface loses cohesion due to melting, loose wet avalanches become common in steeper terrain.

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.