Avalanche Forecast

Issued: Mar 2nd, 2015 7:28AM

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

Avalanche Canada triley, Avalanche Canada

Northerly winds and periods of convective flurries have created windslabs in the alpine.

Summary

Confidence

Good

Weather Forecast

Cold and clear overnight with moderate northerly winds and freezing down to valley bottoms. Cold and clear on Tuesday with alpine temperatures around -20. Cold and clear on Wednesday with moderate northwest winds in the alpine. Thursday is forecast to be cloudy with a westerly flow and a chance of light precipitation.

Avalanche Summary

No new avalanches reported.

Snowpack Summary

Moderate northerly winds have created some thin windslabs from re-distributing the 5-20 cm of snow that is available for transport at alpine elevations. The surface snow has become facetted due to the cold overnight temperatures, and a new layer of surface hoar has been reported in some areas. Strong solar radiation has resulted in a thin breakable melt-freeze crust on southerly aspects at all elevations. The mid-February crust is reported to be strong, and has been stripped of new snow in many areas by northerly winds. The late-Jan crust/surface hoar layer (up to 100 cm deep) and the mid-January surface hoar (80-120 cm deep) are generally dormant, and chances of triggering these weaknesses have decreased dramatically. However, triggering may be possible with a large input such as cornice fall, or an avalanche stepping down, especially on slopes that see a lot of sun.

Problems

Wind Slabs

An icon showing Wind Slabs
Northerly winds have developed isolated pockets of windslab in the alpine. These windslabs may be sitting on a melt-freeze crust on solar aspects.
Avoid freshly wind loaded features.>Avoid travelling in areas that have been reverse loaded by winds.>

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

Elevations: Alpine.

Likelihood

Possible

Expected Size

1 - 3

Valid until: Mar 3rd, 2015 2:00PM

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