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Avalanche Forecast

Archived

Nov 6th, 2020–Nov 7th, 2020

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

Regions

Jasper.

Good early season ski conditions are found on low angle gully features and the travel is overall supportive. Be cautious with all slopes with very early season variable conditions.

Weather Forecast

Saturday will be mix sun and cloud and flurries. Expect -7C and 15-40km/hr NE winds. Sunday will be sunny and low -18C with high -8C with light NE winds. Monday will be sun with flurries, -12C, and light West winds. A little bit of snow may arrive Tuesday.

Snowpack Summary

Treeline conditions are generally a height of snow 30-40cm with overall supportive travel. It is comprised of 10-15cm of low density snow overlying a melt freeze crust which exists up to 2200m. The base can be low density facets formed in October. The Alpine has variable snowpack conditions. Below treeline the snow remains below threshold values.

Avalanche Summary

There were no results from Thursday's explosive control on Parkers slabs but it had not formed a slab. Friday's patrol noted one size 2.5 windslab in the alpine on the South Churchill East facing. It appeared to be cornice triggered, started loose and resulted in a slab lower down. Several other size 2 windslabs noted in Alpine E aspects.

Confidence

Problems

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.

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.