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Avalanche Forecast

Archived

Feb 20th, 2022–Feb 21st, 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 unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

Yukon.

With wind stations rimed, we have uncertainty around the extent of new wind affect on the snow. We haven't seen much for reactivity in wind slabs lately but triggering wind loaded pockets in steep, convex or extreme terrain remains a possibility.

Confidence

Low - Uncertainty is due to limitations in the field data. Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

Weather Forecast

Sunday night: Partly cloudy, moderate northerly wind, low of -22.

Monday: Sunny, light northerly wind, high of -15.

Tuesday: Flurries bringing a trace of snow, strong southwest wind, high of -10.

Wednesday: Sunny, light variable wind, high of -8.

Avalanche Summary

We have received no reports of recent avalanche activity or signs of instability.

Snowpack Summary

This MIN report describes great riding conditions at Fraser on Saturday. 10-20 cm of recent snow appears to be bonding well to a variety of underlying surfaces including a crust that extends up to at least 1200 m on all aspects. Below this, the mid-pack is generally well-settled and strong in most areas. Weak facets (sugary snow) at the base of the snowpack appear to be rounding and bonding.

Terrain and Travel

  • Pay attention to isolated alpine features as well as cross-loaded features at treeline.
  • 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.