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Avalanche Forecast

Archived

Dec 1st, 2024–Dec 2nd, 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 possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
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, human triggered possible.

Regions

Northwest Inland, Howson, Kispiox, Microwave-Sinclair, North Bulkley, South Bulkley, South Bulkley, South Bulkley, Telkwa.

Stick to mellow slopes that are sheltered from the wind to find the best riding and lowest avalanche danger.

Extra caution is required due to the uncertain strength of buried weak layers.

Confidence

Moderate

Avalanche Summary

No new avalanches have been reported, but reports have been extremely limited.

With recent snow available for transport, the forecasted strong wind could make human-triggered wind slab avalanches likely.

If you head to the backcountry please consider submitting your observations to the Mountain Information Network.

Snowpack Summary

Forecasted strong southwesterly winds are expected to build reactive wind slabs on leeward north and east facing slopes.

40 to 70 cm of recent storm snow is sitting on top of various snow surfaces. These include small facets and/or surface hoar in sheltered areas, and heavily wind-affected snow in exposed terrain.

Two surface hoar layers can be found in the middle of the snowpack: One down 60 to 80 cm and another down 60 to 110 cm at treeline.

Deeper in the snowpack, a rain crust from early November seems to be bonding well to overlying layers.

Alpine snow depths vary greatly across the region and from aspect to aspect.

Weather Summary

Sunday Night

Cloudy with 0 to 5 cm of snow. 40-50 km/h southwest ridgetop wind. Treeline temperature -2 °C.

Monday

Cloudy with light rain up to treeline and 3 to 5 cm of snow above. 45-60 km/h southwest ridgetop wind. Treeline temperature 0°C.

Tuesday

Cloudy with moderate rain below 1750 m. 30-40 km/h southwest ridgetop wind. Treeline high 3 °C.

Wednesday

Cloudy with light rain below 2000 m. 20-35 km/h southwest ridgetop wind. Treeline low -2 °C.

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.
  • Be aware of the potential for larger than expected storm slabs due to buried surface hoar.
  • In times of uncertainty, conservative terrain choices are our best defense.

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.