Avalanche Forecast

Issued: Jan 28th, 2021 4:00PM

The alpine rating is moderate, the treeline rating is low, and the below treeline rating is low. Known problems include Wind Slabs.

Avalanche Canada kdevine, Avalanche Canada

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Triggering avalanches remains possible in wind loaded areas and in steep terrain where sluffing may occur. 

Small avalanches can have big consequences if they are triggered above features like cliffs or terrain traps.

Summary

Confidence

High - Confidence is due to a stable weather pattern with little change expected.

Weather Forecast

THURSDAY NIGHT - Mainly cloudy / light southwest wind / alpine low temperature near -9 

FRIDAY - Mainly cloudy with isolated flurries, up to 10 cm in the overnight period / moderate southwest wind / alpine high temperature near -7 

SATURDAY - Flurries, 10 cm, with another 10-15 cm overnight / strong south wind / alpine high temperature near -5 

SUNDAY - Snow, 20-25 cm, with another 15-20 cm overnight / strong south wind / alpine high temperature near -5 

Avalanche Summary

There were a few reports of size 1 human triggered avalanches on steep, wind loaded alpine features on Thursday.

On Tuesday and Wednesday, there were a few reports of natural and human-triggered size 1 avalanches, as well as a few size 1 explosives triggered wind slab avalanches in the alpine on Tuesday.

Snowpack Summary

10-20 cm of recent fresh snow sits on firm, wind affected snow at upper elevations, on surface hoar in sheltered areas, on a melt-freeze crust below 1900 m, and on a sun crust on south-facing slopes. Recent winds have redistributed much of this new snow, creating wind slabs in leeward terrain, and stripping the new snow off of some windward slopes.

A crust from early December may be found around 200 cm deep in the snowpack. In shallow rocky areas, recent test results suggest that it may still be possible to trigger this layer. In deeper snowpack areas it has shown no recent results and appears to be unreactive in these areas.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • Be aware of the potential for loose avalanches in steep terrain where snow hasn't formed a slab.

Problems

Wind Slabs

An icon showing Wind Slabs

Small wind slabs may be possible to trigger in leeward terrain at upper elevations.

Aspects: North, North East, East, South West, West, North West.

Elevations: Alpine, Treeline.

Likelihood

Possible

Expected Size

1 - 1.5

Valid until: Jan 29th, 2021 4:00PM