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Archived

Avalanche Forecast

Dec 17th, 2016–Dec 18th, 2016
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
Treeline
1: Low
The avalanche danger rating at treeline will be low
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
1: Low
The avalanche danger rating below treeline will be low

Regions: Little Yoho.

Incoming snow and wind is expected to increase the avalanche hazard by the end of this weekend, watch for the timing of the approaching weather system.

Weather Forecast

Warmer temperatures and new snow are forecasted to arrive on Sunday night/ Monday morning. This approaching system is expected to arrive with moderate to strong with at higher elevations.

Snowpack Summary

The low elevation snowpack is shallow and facetted, with a total depth of <100 cm up to almost 2000 m elevation. Above that, the snow becomes much deeper and stronger with recent test results showing no significant weak layers or shears in the snowpack. The incoming weather is expect to create a weak interface in the upper snowpack.

Avalanche Summary

No significant slab avalanches have been reported or observed in the past week. Loose snow avalanches (up to size 1.5) are occurring out of steeper terrain. Because of a faceted snowpack avalanche tend to run further then you may expect.

Confidence

Avalanche Problems

Loose Dry

The surface snow is facetted and weak, resulting in large sluffs in steep terrain. Sluffs are picking up mass and running fairly far. Pay attention to terrain traps where snow can accumulate into deeper deposits.

  • Be aware of party members below you that may be exposed to your sluffs.

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

Elevations: Alpine.

Likelihood: Likely

Expected Size: 1 - 2

Wind Slabs

Moderate to strong winds today have added to the wind slab in the alpine.

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

Elevations: Alpine.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2