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Avalanche Forecast

Feb 22nd, 2013–Feb 23rd, 2013
Alpine
4: High
The avalanche danger rating in the alpine will be high
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
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
Alpine
4: High
The avalanche danger rating in the alpine will be high
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: South Coast.

Confidence

Fair - Due to variable weather conditions for the entire period

Weather Forecast

Saturday: Very light snowfall / Light northwest winds (with strong gusts) / Freezing level at 900mSunday: Moderate to locally heavy snowfall developing later in the day / Moderate to strong west winds / Freezing level at 1000mMonday: Light snowfall / Light southwest winds / Freezing level at 800m

Avalanche Summary

Avalanche observations were limited due to poor visibility, although several slab avalanches to size 2 were reported at treeline from the Coquihalla area. Human trigger avalanches will remain a real possibility on Saturday.

Snowpack Summary

Moderate to heavy snowfall has been redistributed into potent wind slabs at treeline and above and may overlie small surface hoar buried on February 20th. Where it exists, the surface hoar will surely prolong the reactivity of the new storm slab.On shaded slopes up to 45cm of snow may overlie surface hoar which was buried on February 12th. Most reports of this layer are coming from the Duffey Lake area where recent snowpack tests have shown sudden planar fracture characteristics at this interface. On solar aspects and at lower elevations recent accumulations overlie a melt freeze crust.The mid and lower snowpack pack layers are generally well settled.

Avalanche Problems

Storm Slabs

Heavy snowfall and strong winds have created widespread storm/ wind slab conditions. Triggering avalanches will be likely, especially in wind-affected terrain.
The new snow may require several days to settle and stabilize.>Stay off recent wind loaded areas until the slope has had a chance to stabilize.>Good day to make conservative terrain choices.>

Aspects: All aspects.

Elevations: All elevations.

Likelihood: Likely

Expected Size: 1 - 5