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Archived

Avalanche Forecast

Jan 29th, 2017–Jan 30th, 2017
Alpine
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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
2: Moderate
The avalanche danger rating in the alpine will be moderate
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: Glacier.

A human triggered avalanche occurred yesterday involving two people.  Expect the avalanche hazard to increase with building winds and precipitation.

Weather Forecast

Cloudy with snow developing this morning and an alpine high of -3C today.  Ridge winds are forecast to rise to 30km/h gusting to 65km/h.  Depending which forecast is correct we could see between a trace and 10cm of snow by tomorrow morning. 

Snowpack Summary

Variable thickness wind slab should be expected along the lee of ridges and cross loaded areas. Sun crusts are present on steep solar aspects and well settled powder may be found in sheltered terrain. Storm interfaces down 25-40cm are bonding in most, but not all locations and are still producing planar results in stability tests.

Avalanche Summary

Yesterday afternoon skiers reported observing another group remote triggered a size 2 slab from 30m+/- away at the 2300m elevation of Cheops North 5, N asp. 2 skiers were involved but not buried or injured. The slide was 30cm deep, 20m wide and ran approximately 200m. There were three size 2 slabs observed in the highway corridor.

Confidence

Wind effect is extremely variable

Avalanche Problems

Wind Slabs

Wind slabs exist at ridge-top and on cross-loaded alpine and treeline features.  Given the right location they may be triggered by skiers.  They are of most concern in high consequence locations such as steep terrain.
Avoid steep convexities or areas with a thin or variable snowpack.Avoid unsupported slopes.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2