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Archived

Avalanche Forecast

Apr 5th, 2014–Apr 6th, 2014
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
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
3: Considerable
The avalanche danger rating below treeline will be considerable

Regions: Glacier.

Weather Forecast

Unsettled weather will bring light snow above 1400m today and tonight. A ridge will build on Sunday bringing convective weather with local squalls and sunny breaks into Monday when freezing levels  are expected to rise to 2000m.

Snowpack Summary

20cm of recent storm snow sits over the April 2 crust on solar aspects. The Mar 22 Cr is down ~50cm, the Mar 2 is down ~1.0m, the Feb 10 is down ~1.75m.

Avalanche Summary

Skier accidental on wind loaded terrain feature yesterday, size 1.0, Balu pass, south east aspect, ~2050m, down 10-15cm and 20m wide. Natural avalanches were observed yesterday morning east of the Rogers Pass summit mostly from the steep north facing gullies from Mt Macdonald up to size 2.5.

Confidence

on Saturday

Avalanche Problems

Storm Slabs

20cm of new snow with some added wind created some reactive conditions at the higher elevations these past two days. Watch for cracking and more 'slabby' feeling snow as you venture on the upper mountain specially in the lee of ridge features.
Be cautious as you transition into wind affected terrain.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Possible

Expected Size: 1 - 2

Persistent Slabs

Many crusts on solar aspects are buried within the 1m range. At this depth they can be triggered by humans. Avoid shallow snowpack areas where it is most likely to initiate an avalanche on this layer.
If triggered the storm slabs may step down to deeper layers resulting in large avalanches.

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

Elevations: Alpine, Treeline.

Likelihood: Unlikely - Possible

Expected Size: 2 - 3