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Avalanche Forecast

Archived

Feb 28th, 2015–Mar 1st, 2015

Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Manage your exposure to overhead cornices and steep solar aspects when the afternoon sun shines. Have fun!

Weather Forecast

A high pressure ridge will keep the sun shining today and northerly winds will keep temperatures cool.  Freezing levels are expected to stay below 1000m.  A weak weather system will bring isolated flurries to the area late Sunday night and into Monday.  Dry weather will prevail again early next week.

Snowpack Summary

Above 2300m, 10-15cm of ski penetration in soft snow. Snow depth on the Illecillewaet glacier/ 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

No new avalanches were observed yesterday. Recent natural avalanche activity has been limited to small skier triggered avalanches on isolated wind slabs and sun triggered loose avalanches on steep solar aspects.

Confidence

Problems

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.