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Avalanche Forecast

Archived

Nov 12th, 2016–Nov 13th, 2016

Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.
Alpine
Below Threshold.
Treeline
Below Threshold.
Below Treeline
Below Threshold.

Regions

Jasper.

Weather Forecast

Wet warm conditions to continue through the weekend and then a cooling and drying trend into the week of Nov 14.

Snowpack Summary

Snowline has moved above tree line on southerly aspects and is rapidly disappearing on northerly tree line slopes. The treeline snowpack is saturated.  There is a melt freeze /rain crust that is present above 1800 m on north aspects and 2400 on south. Where snow is available for transport, thin windslab may have formed on this crust.

Avalanche Summary

Numerous loose wet avalanches to size 2 on steep North to Southeast slopes generally 100 m above treeline and stopping mid-path observed along the Parkway on Saturday.

Confidence

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.

Wind Slabs

Wind Slab avalanches are the release of a cohesive layer of snow (a slab) formed by the wind. Wind typically transports snow from the upwind sides of terrain features and deposits snow on the downwind side. Wind slabs are often smooth and rounded and sometimes sound hollow, and can range from soft to hard. Wind 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.