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Avalanche Forecast

Archived

Feb 18th, 2022–Feb 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.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

Yukon.

Recent snow has been largely unreactive but it may still be possible to trigger slabs in wind loaded terrain features. Watch for signs of instability like whumphing, cracking or recent avalanches.

Confidence

High -

Weather Forecast

Friday night: Flurries around 5 cm, ridgetop winds moderate southwest, alpine temperature around -7.

Saturday: Flurries around 3 cm, ridgetop winds light to moderate northwest, high of -5.

Sunday: A mix of sun and cloud, ridgetop winds light to moderate northwest, high of -12.

Monday: Sunny, ridgetop winds light to moderate northwest, high of -12.

Avalanche Summary

Recent snowfall has been incremental, warm and sticky and seems to be stabilizing as it accumulates. We have received no reports of avalanche activity or signs of instability.

Snowpack Summary

10-20 cm of recent snow appears to be bonding well to a variety of underlying surfaces including wind affected surfaces and/or 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) exist at the base of the snowpack, especially in more shallow snowpack areas further inland.

Terrain and Travel

  • Be carefull around freshly wind loaded features.
  • Look for signs of instability: whumphing, hollow sounds, shooting cracks, and recent avalanches.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.

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.