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Archived

Avalanche Forecast

Dec 14th, 2015–Dec 17th, 2015
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
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
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

Regions: Waterton Lakes.

Forecast light snowfall will continue to improve ski conditions but is not expected to increase the hazard. Early season conditions persist, the snowpack varies dramatically with aspect and elevation - please factor this into your decision making.

Weather Forecast

We are into a relatively benign weather pattern for this week.  A weak front sliding down from the North will bring light snowfalls to the area today, and possibly Wednesday, as it nudges against a ridge of high pressure which continues to build over Southern BC.

Snowpack Summary

Up to 30 cm of new snow since Dec. 10th was redistributed into fresh storm slabs by light-mod SW-NW winds. 3 buried crusts exist; two from early December are widespread below tree-line, and one from mid November at all elevations which was scoured clean in exposed areas prior to last weeks storm - these have not produced any recent avalanches.

Avalanche Summary

No new avalanche activity has been observed or reported.

Confidence

Avalanche Problems

Storm Slabs

Use caution above cliffs where small avalanches may have severe consequences.Use caution in lee areas. Recent snowfall mixed with wind loading has created storm slabs.

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Early December crusts may also act as weak layers.
Assess start zones carefully and use safe travel techniques.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 1 - 3