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Avalanche Forecast

Archived

Dec 15th, 2022–Dec 16th, 2022

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.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland, Kispiox, Microwave-Sinclair, Ningunsaw, South Bulkley, South Bulkley, Telkwa.

Avalanche Danger will largely be driven by the wind over the short-term. North winds will deposit any loose snow into new wind slabs through reverse-loading. Look for higher quality riding in sheltered terrain features well below ridge line.

Confidence

Moderate

Avalanche Summary

Our field team reported one size 2 natural wind slab avalanche on a southeast facing alpine feature 24-48hrs old.

Thank you for the MIN reports. They are extremely helpful to us! If you head into the backcountry please submit a MIN report!

Snowpack Summary

In general, the snowpack is highly wind affected resulting in a wide variation in snowpack depths. Depths at treeline range from 50 to 125cm. Riding quality is best in sheltered terrain.

Upper Snowpack

20cm of loose snow will be redistributed by north winds and deposited into wind slabs.

Mid-pack

Generally well settled. A mid-November crust and facet layer is down approximately 60cm from the surface and is reportedly bonding well.

Lower-pack

Weak sugary snow (basal facets).

Weather Summary

Thursday night

Mostly starry. No new snow. Wind from the west at 30km/h. Temperature -5˚C

Friday

Mostly cloudy. Flurries beginning late in the day with little accumulation. Wind from the northwest at 40km/h in the alpine. Temperature starting at -5˚C decreasing to -10˚C by the end of the day.

Saturday

Partly cloudy. Flurries possible. Wind from the north at 15km/h. Temperature down to -20˚C.

Sunday

Partly cloudy. No new snow. Wind form the northeast at 25km/h. Temperatures plunging to -30˚C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Wind slabs are most reactive during their formation.
  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.
  • Watch for areas of hard wind slab on alpine features.

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.