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Avalanche Forecast

Archived

Mar 11th, 2022–Mar 12th, 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.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Below Threshold.

Regions

Yukon.

The wind finally has fresh snow to move around!

Watch for pockets of fresh wind slab forming in east facing terrain features. Storm snow will be most reactive where it sits over a crust. 

Confidence

Moderate - Uncertainty is due to the track & intensity of the incoming weather system. Uncertainty is due to the extreme variability of wind effect on the snowpack.

Weather Forecast

Light snowfall tapers off Saturday afternoon. Sunday brings a brief break in the snow and wind with another active front forecast to hit late evening.

FRIDAY NIGHT: 5 cm of snow possible overnight, strong southwest wind. Freezing level valley bottom.

SATURDAY: Cloudy, up to 2-8 cm of snow, moderate to strong westerly winds. Freezing level valley bottom, alpine high -6 °C.

SUNDAY: Cloudy with light flurries. Light to moderate southeast winds. Freezing levels at valley bottom. Alpine high of -12. 

MONDAY: Snow begins overnight with 5 cm possible by morning and another 5 cm over the day. Strong southerly winds. Freezing levels at valley bottom, alpine high of -6.

Avalanche Summary

No new avalanches have been reported since Saturday. 

If you head out into the mountains, please let us know what you see on the Mountain Information Network. 

Snowpack Summary

Light snowfall sits over heavily wind affected surfaces in most terrain features. On steep, sun-affected terrain new snow may sit over a crust.

Another crust is buried 20-40cm deep on south facing terrain. On other aspects, an interface of weak facetted crystals exists that has not produced recent avalanche activity. 

The lower snowpack is well bridged by the layers above, and it is unlikely that avalanches will be triggered on weak, sugary crystals near the ground at this time. 

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Be careful with wind slabs, especially in steep, unsupported and/or convex terrain features.
  • Avoid slopes that sound hollow or drum-like.

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.