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Avalanche Forecast

Archived

Jan 11th, 2024–Jan 12th, 2024

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

Regions

Glacier.

Variable winds have created fresh wind-slabs on all aspects. Use caution travelling near ride-top and in lee or cross-loaded terrain..

Environment Canada has also issued an extreme cold warning for Rogers Pass due to frigid temps and moderate winds. There is a high risk of frost-bite, so factor that into your trip planning.

Confidence

Moderate

Avalanche Summary

Up to 50 cm of storm snow and moderate S/SW winds trigged a widespread natural cycle Tuesday into Wednesday morning. Avalanches, up to sz 3.0, were reaching into the runout zones and running far where a crust is present.

On Tuesday, a field team on McGill shoulder was able to trigger loose dry avalanches running fast in steep terrain.

This week several human triggered avalanches occurred failing at the base of the new snow, Video Peak and Forever Young.

Snowpack Summary

Moderate S/SW winds have redistributed 40-50cms of recent storm snow. Below this a sun crust is found on solar aspects; firm wind effect in the alpine; and soft facetted snow on sheltered N aspects.

Below 2100m there is a crust down 70-80cm (from Dec 5th/6th).

The Dec 1 surface hoar layer is down 90-120cm and is decomposing. However, it is still reactive in isolated snowpack tests.

Weather Summary

An extremely cold arctic ridge is building over BC and pushing south.

Tonight: clear, light E winds, low -36 °C

Fri: Sunny, light E winds, high -31 °C

Sat: Sunny, light E winds, high -20 °C

Sun: sunny, light E winds, high -18 °C

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Be carefull with sluffing in steep terrain, especially above cliffs and terrain traps.

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.