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Avalanche Forecast

Archived

Nov 11th, 2015–Nov 12th, 2015

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

Regions

Glacier.

Skiing is still rugged down low. Taking a ride in a slide would leave you with little pride.

Weather Forecast

Light to moderate snowfall throughout the day, with freezing levels remaining below 1000m. Winds will be moderate westerlies. Brace yourself for a stronger, warmer storm Thursday/Friday, with 50-70cm of snow, rising freezing levels, and strong ridge-top winds.

Snowpack Summary

10-15cm of overnight snow blankets an shallow, early season snowpack. There is widespread surface hoar under this new snow. Wind slabs in alpine and tree-line lee features are starting to bond better with the underlying snowpack. Many rocks, stumps, and trees are still poking through the surface, so early season hazards still prevail.

Avalanche Summary

On Sunday, a skier-triggered size 3.5 along Bruins Ridge caught two people. Partial burial of those involved. Dimensions were 50-100cm deep, 300m wide, and 1200m in length. The slide covered part of the Video Pk uptrack. Natural activity has eased off since the last storm, but will likely ramp up again with the approaching storm front.

Confidence

Due to the number of field observations

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.

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.