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Avalanche Forecast

Archived

Feb 22nd, 2022–Feb 23rd, 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, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Northwest Inland.

Wind slabs may remain reactive to human triggers. As you enter wind affected terrain, watch for wind slabs on all aspects especially near ridge crests and roll-overs.

Confidence

High -

Weather Forecast

Tuesday night: Flurries bringing 3-8 cm, strong northwest wind, low of -15.

Wednesday: Flurries 3-8 cm then clearing in the afternoon, strong northwest wind, high of -9.

Thursday: Sunny, light to moderate northwest wind, high of -7.

Friday: Sunny, light to moderate southwest wind, high of -5.

Avalanche Summary

On Monday, avalanche activity was limited to thin, size 1 wind slabs and loose dry sluffing.

Several skier triggered wind slabs size 1-1.5 have been reported over the past few days, most in predictably wind loaded lees or convexities, near ridgetop, around treeline or higher. On Saturday near Kispiox, a size 1.5 was accidentally triggered on a previously skied slope and ran surprisingly far on the underlying crust.

Snowpack Summary

10-20 cm of recent snow has seen variable wind effect at upper elevations, with exposed windward features scoured down to the crust in some areas in the Babines. Good snow quality can still be found in sheltered terrain.

The recent snow sits over a 10-20 cm thick rain crust which effectively caps the underlying snowpack, making human triggering of avalanches on weak layers deeper in the snowpack very unlikely.

Terrain and Travel

  • Be careful with wind loaded pockets, especially near ridge crests and roll-overs.
  • Wind slabs may be poorly bonded to the underlying crust.
  • Recent wind has varied in direction so watch for wind slabs on all aspects.
  • Small avalanches can have serious consequences in extreme terrain. Carefully evaluate your line for wind slab hazard before you commit to it.

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.