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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.
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

Coquihalla, Harrison-Fraser, Manning, Skagit.

Continually assess conditions as you move through terrain. Rider triggerable wind slabs may still be found on lee and cross loaded features in the alpine.

Confidence

Moderate

Avalanche Summary

Numerous wet loose and dry loose avalanches up to size 1 were reported on Wednesday.

Snowpack Summary

A new crust can be found at or near the surface on all but high north facing terrain. Rider triggerable wind slab could still be found in the alpine on west through east aspects.

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

Weather Summary

Thursday Night

Partly clear with the possibility of light flurries bringing a few cm 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 variable winds and freezing levels rising to 1600 m.

Saturday

Cloudy in the afternoon with up to 5 cm of new snow possible. Strong southerly winds and freezing level rising to 1600 m with the snowline around 1400 m.

Sunday

Stormy with up to 10 cm of new snow expected. Moderate to strong southerly winds and freezing levels rising to 1700 m. Snowline around 1400 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.
  • 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.