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Avalanche Forecast

Archived

Nov 29th, 2015–Dec 2nd, 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, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Waterton Lakes.

Good early season skiing if you can fight your way out of the valley bottom. Watch for increased avalanche activity as overnight low temperatures increase, particularly if there is no overnight freeze.

Weather Forecast

Continued clear skies and light winds into the week, with overnight lows on the rise.

Snowpack Summary

Recent surface hoar growth of up to 10mm in the valley bottoms. Watch for isolated pockets of soft storm slab in the alpine and at treeline, from last weeks post frontal winds. Otherwise the shallow early season snowpack is generally well settled, with no notable weak layers.

Avalanche Summary

Isolated loose snow avalanches up to size 1.0 have been observed in the past 48hrs on steep solar aspects.

Confidence

Due to the number of field observations

Problems

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.

Storm Slabs

Storm Slab avalanches are the release of a cohesive layer (a slab) of new snow that breaks within new snow or on the old snow surface. Storm-slabs typically last between a few hours and few days (following snowfall). Storm-slabs that form over a persistent weak layer (surface hoar, depth hoar, or near-surface facets) may be termed Persistent Slabs or may develop into Persistent Slabs.