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Avalanche Forecast

Archived

Nov 24th, 2019–Nov 25th, 2019

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

Regions

Jasper.

30cm of new snow in the Icefields with SW wind.

The bond seems to be good between new and old snow surfaces; patience and time is be needed to be sure.

Travel near open water and sheltered terrain traps are most vulnerable to a reactive instability.

Weather Forecast

Progressive cooling overnight and continues through the week. For more details: Avalanche Canada's, Mountain Weather Forecast.

Snowpack Summary

30cm of storm snow (HST) overnight Saturday at TL in the Icefields. This HST is sitting on a variety of surfaces depending on elevation and aspect. Surface hoar may be preserved in sheltered locations. The snow seems to be bonding well to previous surfaces at all elevations.

Avalanche Summary

Road patrols in the Maligne Valley and Icefields reported generally poor visibility but no natural avalanches observed at any elevation. Field team in Icefields reported a profile at TL (2240m). HS: 125cm. Found a moderate, resistant planar compression result down 40cm, likely on buried windslab.

Confidence

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.

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.