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Archived

Avalanche Forecast

Dec 31st, 2012–Jan 1st, 2013
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: Purcells.

Confidence

Good

Weather Forecast

Overnight and Tuesday: Light Northwest winds increasing to moderate overnight, becoming strong during the day. Freezing level at valley bottom overnight and rising to 800 metres during the day. Alpine temperatures -8.0 overnightWednesday: Winds are expected to switch to the West and lower to moderate values. Mostly sunny skies with some chance of an inversion in the alpine during the day that may bring temperatures up to about -3.0.Thursday: Alpine temperatures should cool down to about -6.0 under mostly clear skies and moderate Southwest winds.

Avalanche Summary

A glide crack release size 2.0 was reported in the Bugaboos. Several cornices were reported to fall naturally, and they did not release slabs on the slopes below.

Snowpack Summary

New snow combined with wind has formed fresh wind slabs on the surface and/or buried newly formed surface hoar in sheltered, open areas at and below tree line. The mid-pack is reported to be well settled. There has been a recent report of the early November crust (near the base of the snowpack) being reactive. It's important to note that professionals are still cautious about this lingering persistent slab problem, however the likelihood of triggering is low. Be wary of steep complex terrain with a shallow snowpack, where triggering a persistent weakness is more likely.

Avalanche Problems

Wind Slabs

Watch for newly formed and buried windslabs in the lee of terrain features and on cross-loaded features.
Be cautious as you transition into wind affected terrain.>Use ridges or ribs to avoid pockets of wind loaded snow.>

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 3