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Avalanche Forecast

Archived

Mar 10th, 2022–Mar 11th, 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.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

Yukon.

Light snow and strong winds brings fresh potential for small but reactive wind slabs to build around ridgeline and terrain features. 

Confidence

Moderate - Uncertainty is due to the extreme variability of wind effect on the snowpack.

Weather Forecast

THURSDAY NIGHT: Cloudy, up to 3 cm snow, moderate to strong southwest wind, freezing levels at valley bottom. 

FRIDAY: Cloudy, up to 5 cm snow, strong southwest wind. Freezing level valley bottom, alpine high -9 °C.

SATURDAY: Cloudy, up to 5 cm snow, moderate to strong west and southwest wind. Freezing level valley bottom, alpine high -6 °C.

SUNDAY: Cloudy with flurries. Light to moderate southeast winds. Freezing levels at valley bottom. Alpine high of -16. 

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 will bury heavily wind affected surfaces. Soft snow can only be found in terrain that is very sheltered. On steep, sun-affected terrain new snow may sit over a crust.

Another crust is buried 20-40cm deep on south facing terrain. Other aspects hold more dense snow at this depth from previous strong winds. 

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.