Avalanche Forecast

Issued: Jan 13th, 2021 4:00PM

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

Avalanche Canada MBender, Avalanche Canada

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Steady snow flurries over the next few days combined with forecast moderate to strong southerly wind is likely to continue to promote wind slab formation in open terrain.

Summary

Confidence

Moderate - Uncertainty is due to the speed, direction, or duration of the wind and its effect on the snowpack.

Weather Forecast

WEDNESDAY NIGHT: Mostly cloudy with isolated flurries, moderate southwest wind, alpine temperature -7 C.

THURSDAY: Mix of sun and cloud with increasing cloud and flurries in the afternoon, moderate to strong south and southeast wind, alpine temperature -9 C.

FRIDAY: Mostly cloudy with snowfall, accumulation 5-10 cm, moderate to strong south wind, alpine temperature -4 C.

SATURDAY: Mostly cloudy with flurries, accumulation 5 cm, moderate southeast wind, alpine temperature -4 C.

Avalanche Summary

There are no new reports of avalanche activity in the past few days. I would suspect that wind slabs will increasingly become an issue as smaller amounts of snow continue to accumulate along with forecast winds to be steady moderate to strong from a southerly direction.

Snowpack Summary

Snow has continued to accumulate over the past several days with several small snowfalls, along with moderate southwest wind. These conditions are expected to continue for the coming days, with small amounts of new snow and more moderate south to southwest wind.

Around Log Cabin, around 40 cm of snow may overlie a layer of surface hoar. This layer was the culprit of avalanche activity last week. This layer has not been reported elsewhere in the region.

A buried crust from early December can be found 60-100 cm below the surface, but most reports suggest the snow is well-bonded to it.

The lower snowpack is strong around White Pass, but there is potential for a generally thinner and weaker snowpack structure to exist in inland areas, such as the Wheaton Valley. 

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Sheltered slopes at lower elevations will offer the best riding.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

Problems

Wind Slabs

An icon showing Wind Slabs

Further snowfall and wind will form wind slabs in exposed terrain. The softest riding conditions will likely be in sheltered areas around treeline.

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

Elevations: Alpine, Treeline.

Likelihood

Possible - Likely

Expected Size

1 - 2

Valid until: Jan 14th, 2021 4:00PM