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Archived

Avalanche Forecast

Feb 9th, 2014–Feb 10th, 2014
Alpine
1: Low
The avalanche danger rating in the alpine will be low
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
2: Moderate
The avalanche danger rating at treeline will be moderate
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
Treeline
3: Considerable
The avalanche danger rating at treeline will be considerable
Below Treeline
2: Moderate
The avalanche danger rating below treeline will be moderate

Regions: Glacier.

Good day to consider longer alpine tours while the ski penetration remains low.

Weather Forecast

A weak ridge of high pressure gives dry and cold condtions again to today, expect alpine temps around -10 and light ridge top winds from the south.  Flurries will start overnight with 10 cm of snow forecast for Monday with increasing southerly winds, gusting to 45 km/h.  Snow is forecast to continue Tuesday with another 15 cm.

Snowpack Summary

A variety of surfaces exists including hard slab, loose, cold facets, and breakable crust. Wind slabs are present in exposed terrain on many aspects due to reverse loading winds over the last 2 days. 2 buried surface hoar layers are present in the upper 15 cm of snow, waiting to be loaded by the incoming storm. The mid pack is well settled.

Avalanche Summary

Ski-cuts are producing fast sluffing to size 1 in the upper 5-15cm in loose, faceted snow. The faceted snow entrained mass and flowed into low angle terrain over 250-300m downhill. While these sluffs were not big enough to bury a person, you would certainly be pushed over by them, disconcerting in "no-fall" zones with cliffs below.

Confidence

Intensity of incoming weather systems is uncertain

Avalanche Problems

Wind Slabs

Thin pockets of wind slab are present on exposed treeline and alpine lee features.  North and east winds have created reverse loading conditions.
Avoid travelling in areas that have been reverse loaded by winds.Caution in lee and cross-loaded terrain near ridge crests.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 1 - 2