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Avalanche Forecast

Archived

Nov 26th, 2024–Nov 27th, 2024

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, Manning, Skagit.

Seek out sheltered powder to avoid wind slabs and find better, safer riding. Put your guard up if you encounter signs of new slabs forming and while you navigate areas of thin coverage.

Confidence

Low

Avalanche Summary

We have not had any reports of avalanche activity. Riders may still encounter pockets of reactive wind slab in more recently wind-loaded terrain at treeline and alpine elevations.

Please consider sharing any observations you have on the Mountain Information Network.

Snowpack Summary

Around 100 cm of snow can be found at treeline elevations, where sheltered powder is still being found on shaded aspects. Snowpack height diminishes rapidly and firm surface crusts are present below about 1500 m.

The snowpack is heavily wind-affected in the alpine. Lingering hard wind slabs may be found around leeward terrain features in the alpine and to a more limited extent at treeline.

Various melt-freeze crusts are found in the bottom half of the snowpack but do not appear to be avalanche concerns.

Weather Summary

Tuesday night

Cloudy. 20 to 30 km/h northwest ridgetop wind, increasing in the morning. Freezing level 600 m.

Wednesday

Cloudy with isolated flurries. 25 to 35 km/h west ridgetop wind. Treeline temperature -5 °C. Freezing level 700 m.

Thursday

Mostly cloudy. 30 to 40 km/h west and southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 700 m.

Friday

Cloudy with flurries bringing 10 -15 cm of new snow. 40 - 60 km/h southwest ridgetop wind. Treeline temperature -4 °C. Freezing level 700 m.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Carefully evaluate steep lines for wind slabs.
  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Wind slabs are most reactive during their formation.

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.