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Avalanche Forecast

Feb 12th, 2013–Feb 13th, 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
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: Sea To Sky.

Confidence

Good

Weather Forecast

Synopsis: A low pressure system exists the region Wednesday morning leaving behind unstable air that may give some lingering flurries into Thursday. On Friday a ridge builds giving clearer, warmer weather.Wednesday: Flurries with clear breaks for many areas. Strong westerly winds diminishing through the day. Freezing level around 900mThursday: Dry but cloudy. Northwest winds to 30km/h at ridgetop. Freezing level around 700m.Friday: Dry with alpine sunshine but a good chance of valley cloud. Light northwesterly winds. Freezing level rising to 2200m, with inversions likely.

Avalanche Summary

There have been no reports of avalanche activity since the weekend.

Snowpack Summary

Relatively small pockets of fresh wind slab have formed in alpine areas in response to recent new snow and wind. Several crusts can be found in the snowpack, especially on solar aspects. A crust buried around Feb 3rd was the focus of avalanche activity during the last storm, but reports indicate this layer has settled out fairly rapidly. Areas with residual concern for this layer are on steep, unsupported (convex) features on south and west facing terrain, and possibly on slopes threatened by a cornice (if it were to collapse and provide a very large trigger). The mid and lower snowpack layers are generally well settled. Total snow depths vary from around 400 cm in the south to around 180 cm in the north.

Avalanche Problems

Wind Slabs

Recent new snow and strong winds have built fresh wind slabs behind ridges and ribs in exposed areas.
Watch freshly wind loaded features.>Use ridges or ribs to avoid pockets of wind loaded snow.>

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

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 4