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Archived

Avalanche Forecast

Jan 13th, 2012–Jan 14th, 2012
Alpine
3: Considerable
The avalanche danger rating in the alpine will be considerable
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: Northwest Coastal.

Confidence

Good - -1

Weather Forecast

Saturday: Trace amounts of snow expected in the morning with a clearing pattern developing in the afternoon / Light westerly winds switching to Northerly in the afternoon / -12.0 @ 1500mSunday: Clear skies / Light to moderate northerly winds / -15.0 @ 1500mMonday: Clear skies / Moderate to strong northeast wind / -28 @ 1500m

Avalanche Summary

1 size 2, and 1 size 3 were reported from the Bear Pass area. No other avalanches were reported from the region. This may speak more to limited observations due to weather, rather than actual conditions.

Snowpack Summary

Some areas (Terrace, Kaziks) are reporting an alpine snowpack of 5 metres. In these areas the mid-december surface hoar-facet layer is buried down about 250 cm and has not been reactive for quite some time. At this time the biggest issue in the region seems to be new snow instabilities. Although they can be quicker to heal than other weaknesses, they may be highly destructive, especially with this season's pattern of heavy accumulations of snow combined with strong winds.The region received about 20cm of new snow on thursday night which added to the heavy accumulations from last weekend. Wind values during thursday's snowfall are uncertain in the Terrace area. In spots that experienced strong winds during the storm may have thick windslabs that may take another couple of days to settle. The mid and lower snowpack is generally well settled and strong.Be cautious of large, recently developed cornices. They may be destructive by themselves, or they can become a trigger for an avalanche on the slope below.

Avalanche Problems

Wind Slabs

Expect widespread windslabs on lee features at treeline and in the alpine.

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

Elevations: Alpine, Treeline.

Likelihood: Likely

Expected Size: 2 - 5

Storm Slabs

Thursday's snowfall will add to a layer of recent storm snow that may take a couple of days to bond to the old surface.

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 2 - 4