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Archived

Avalanche Forecast

Feb 27th, 2015–Feb 28th, 2015
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
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
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

Regions: Glacier.

Cool temperatures have greatly improved stability but watch out for the late-day sun effect on steep solar aspects and cornices. A bulletproof crust below treeline makes for tricky skiing and high consequence falls.

Weather Forecast

A ridge of high pressure continues to dominate the weather pattern. For today, a mix of sun and cloud with a moderate NW wind, no precipitation and freezing levels below 700m.  Alpine high is expected to be -8.  The cold and clear weather is will last throughout the weekend. A weak low arrives late sunday with light precipitation early next week. 

Snowpack Summary

Above 2300m, 15cm of soft snow sits on a supportive crust. Snow depth on the Illecillewaet Neve is 2.5 to +3m. Bulletproof crust bellow 2000m. Feb 18 surface hoar down 20cm, variable distribution to 2200m. Feb 14 crust down 20-25, up to 10cm thick. Variable windslab above treeline. Persistent weak layers down 1-1.5m are stubborn to trigger.

Avalanche Summary

A field team observed a small skier triggered wind slab from a steep alpine up track.  Avalanches from the past several days have been triggered by strong afternoon sun on steep solar aspects.

Confidence

Avalanche Problems

Persistent Slabs

There are several weak layers in the snowpack that are now difficult to trigger but result in very large avalanches when they do fail. Strong solar radiation or a large cornice failure are possible triggers.
Conditions are greatly improved, but be mindful that deep instabilities are still present.

Aspects: All aspects.

Elevations: Alpine, Treeline.

Likelihood: Unlikely

Expected Size: 3 - 4