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Avalanche Forecast

Archived

Dec 1st, 2014–Dec 2nd, 2014

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

Regions

Jasper.

Caution to skiers and climbers playing in gully features as there is still lingering pockets of snow that could knock you over.The highway is open from Jasper to Lake Louise.

Weather Forecast

Temperatures continue to rise gradually to more seasonal norms. A mix of sun and cloud over the next few days will bring small amounts of snow. West and northwest winds will be moderate in the alpine.

Snowpack Summary

The weekends storm snow is 115cm and that tapers off south of Parkers Ridge. The main weakness is a sandwich of crusts and facets at the mid to lower snowpack.Additional snow loading continues to occur on Easterly aspects from the NW winds in the alpine.

Avalanche Summary

Two natural avalanches to size 2 have come down on north aspects in the alpine in the past 12 hours. Snowpack is settling but any increase in temperature and or wind transport could up the hazard again.

Confidence

Timing or intensity of solar radiation is uncertain on Thursday

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 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.