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Avalanche Forecast

Archived

Nov 29th, 2017–Nov 30th, 2017

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

Regions

Jasper.

Excellent riding can be found in sheltered treeline locations.

Weather Forecast

Cloudy with sunny periods and isolated flurries bringing a trace of new. Cools temps with light to moderate SW gusty winds. Alpine high, -8.

Snowpack Summary

Wind slabs continue to build in exposed lee features. Storm slabs formed with 40cm of snowfall over the weekend. These problems sit on a recently developed rain crust 30-60cm deep. A persistent slab up to 200cm thick sits on the Halloween Crust, low in the snowpack. This crust can be found up to 2,700m depending on location.

Avalanche Summary

Previous unobserved natural activity from the alpine, evident meow with good visibility.

Confidence

Due to the number and quality 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.