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Avalanche Forecast

Archived

Feb 8th, 2021–Feb 9th, 2021

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Below Threshold.

Regions

Yukon.

Low hazard doesn't mean no hazard, it may be possible to trigger isolated pockets of windslab in steep and extreme terrain.

Confidence

High - Confidence is due to a stable weather pattern; little change is expected for several days.

Weather Forecast

MONDAY NIGHT - Cloudy with clear periods and isolated flurries / moderate northeast wind / alpine low temperature near -25 

TUESDAY - A mix of sun and cloud with isolated flurries / moderate northeast wind / alpine high temperature near -25

WEDNESDAY - Sunny / moderate east wind / alpine high temperature near -20

THURSDAY - Sunny / moderate to strong southeast wind / alpine high temperature near -15

Avalanche Summary

Small, dry loose avalanches may be possible in steep, sheltered terrain where the snow is still soft. Triggering wind slabs may also be possible in extreme terrain.

This MIN does a great job of highlighting the lingering wind slab problem that exists in more extreme terrain. There are a few more great MINS that shed light on recent riding conditions too.

Snowpack Summary

In wind-sheltered locations, you may find up to 10 cm of light snow sitting on old, unreactive slabs that may be softening in the cold temperatures.  

In wind exposed terrain, the wind effect is extensive and vast fields of sastrugi can be found.  

A buried weak layer of surface hoar may still be found around 90 cm deep. It was found around Log Cabin and also in Powder Valley (see here). Avalanche activity on this layer hasn't been reported since the first week of January and isn't expected to spike without a substantial snowfall or warming trend.

The lower snowpack is strong around White Pass but a thinner and weaker snowpack structure is expected inland, such as in the Wheaton Valley and the south Klondike.

Terrain and Travel

  • Use caution above cliffs and terrain traps where even small avalanches may have severe consequences.
  • Watch for wind-loaded pockets especially around ridgecrest and in extreme terrain.
  • Sheltered slopes at lower elevations will offer the best riding.

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.