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Avalanche Forecast

Archived

Jan 18th, 2022–Jan 19th, 2022

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

Regions

Yukon.

Assess for the formation of new wind slabs as the day progresses.

Confidence

High -

Weather Forecast

TUESDAY NIGHT: Partly cloudy with no precipitation, 40 km/h south wind, alpine temperature -9 C.

WEDNESDAY: Cloudy with snowfall, accumulation 5 cm, 50 km/h south wind, alpine temperature -9 C.

THURSDAY: Cloudy with snowfall, accumulation 5 cm, 40 km/h southwest wind, alpine temperature -5 C.

FRIDAY: Cloudy with snowfall, accumulation 5 cm, 40 km/h southwest wind, alpine temperature -6 C.

Avalanche Summary

No new avalanches were observed on Monday. A few small avalanches were triggered by riders near White Pass over the weekend (see here and here).

We appreciate all your observations on the Mountain Information Network.

Snowpack Summary

Around 5 cm of snow and strong southerly wind are forecast, which will form new wind slabs in lee terrain features. In sheltered terrain, around 10 cm of softer snow may exist.

The remainder of the snowpack has been reported as being hard but heavily faceted.

Terrain and Travel

  • Wind slabs are most reactive during their formation.
  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid terrain traps such as gullies and cliffs where the consequence of any avalanche could be serious.

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.