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Avalanche Forecast

Archived

Feb 24th, 2014–Feb 27th, 2014

Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches possible, human triggered probable.
Below Treeline
Natural avalanches possible, human triggered probable.

Regions

Waterton Lakes.

With a stretch of bright sunny days this week don't get taken by surprise! Dangerous avalanche conditions are persisting. As well, sun warming effects may increase the avalanche danger rating during the mid part of the day.

Weather Forecast

The next few days we may see more sun than we have for some time . Just a chance of flurries late Thursday. Temperatures warming to as high as -3C in the alpine on Wednesday. Solar warming has the potential to raise the danger rating during the hours of peak sunshine.

Snowpack Summary

The 60cm of snow over the Continental Divide that fell in the past week is slowly settling. Avalanche activity has tapered off since the weekend but with cold temperatures facet concerns buried now under 80 to 100cm of persistent slab and loose dry snow triggering is possible. No stability tests to report

Avalanche Summary

avalanche activity has tapered off with the clearing and cooling trend

Confidence

Due to the number of field observations

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.

Loose Dry

Loose Dry avalanches are the release of dry unconsolidated snow and typically occur within layers of soft snow near the surface of the snowpack. These avalanches start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-dry avalanches include point-release avalanches or sluffs.