Avalanche Forecast

Issued: Jan 2nd, 2013 9:36AM

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

Avalanche Canada jfloyer, Avalanche Canada

Summary

Confidence

Fair - Forecast snowfall amounts are uncertain on Friday

Weather Forecast

Thursday: Dry until late afternoon. Sunshine in the morning, clouding over in the afternoon. Winds moderate from the south. Freezing level falling rapidly during the day from around 2000 m in the morning to around 700 m in the afternoon. Friday: Light precipitation in some areas. Freezing level will rise to around 1100 m. Winds diminishing to light southwesterly. Saturday: 10-15 cm new snow. Freezing levels around 1100 m. Winds gusting to 60 km/h from the SW.

Avalanche Summary

No new avalanches observed, except a cornice release, which did not pull a slab on the slope below.

Snowpack Summary

Recent mild temperatures have consolidated previous wind slabs in most areas, although it may still be possible to find relatively thin windslabs on the lee side of ridge top and on cross loaded features in exposed areas. The warm temperatures have created a moist snow surface, which will freeze into a crust as temperatures cool. This will be most noticeable on south facing slopes. No significant shears have been observed recently in the top or mid snowpack layers. Near the base of the snowpack, a crust/facet layer exists, but is now unlikely to be triggered. However, professionals are still mindful of thin snowpack trigger areas or large loads (like a large cornice) which could wake it up again, leading to a very large avalanche.

Problems

Wind Slabs

An icon showing Wind Slabs
A shift in wind direction to the SW will set up new wind slabs on northerly and easterly aspects in exposed areas.
Be cautious as you transition into wind affected terrain.>Give cornices a wide berth when travelling on or below ridges.>

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

Elevations: Alpine, Treeline.

Likelihood

Unlikely - Possible

Expected Size

1 - 4

Valid until: Jan 3rd, 2013 2:00PM