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Avalanche Forecast

Archived

Mar 20th, 2018–Mar 21st, 2018

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

Regions

Glacier.

The best skiing and riding conditions exist on North and East Aspects in the Alpine and Treeline.

Weather Forecast

A mixed bag of weather today with sun, cloud and flurries. The Alpine will reach -5 and the freezing level will rise to 1500m, winds will be light to moderate from the southwest. More of the same can be expected tomorrow and on Thursday we can expect another 10cm and a touch more on Friday as a weak low-pressure system passes over Rogers Pass.

Snowpack Summary

The snowpack is generally well settled with 15+ cm of new snow on the surface. Above treeline this new snow remains dry and unconsolidated burying a previous melt freeze crust that extends up to 2300m on all aspects and to mountaintop on solar aspects. Below treeline the upper snowpack contains a series of crusts at or near the surface.

Avalanche Summary

Limited natural avalanche activity over the last couple days, except out of very steep unsupported terrain. Another 10cm fell last night which may sluff away easily if overlying a crust.

Confidence

Due to the number of field observations

Problems

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.

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.