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Avalanche Forecast

Archived

Nov 23rd, 2018–Nov 24th, 2018

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.

Trace amounts of precip and light winds in the forecast are not enough for a reset of the terrain. Good riding can still be found on sheltered lee locations.

Weather Forecast

Click here for the Avalanche Canada mountain weather forecast. No new snow is expected on Saturday.

Snowpack Summary

Forecast area experiencing light to calm winds last couple of days keeping 5cm of new powder snow over previous surfaces. The Oct 25 crust is 2-4cm thick and down 60 to 80cm with facets above and below it. Hard progressive collapse failures have been observed immediately below this crust. Early season hazards lurk just below the surface.

Avalanche Summary

No patrol on Friday and nothing new reported. Nothing new observed or reported on Thursday but visibility was poor.

Confidence

Problems

Deep Persistent Slabs

Deep Persistent Slab avalanches are the release of a thick cohesive layer of hard snow (a slab), when the bond breaks between the slab and an underlying persistent weak layer deep in the snowpack. The most common persistent weak layers involved in deep, persistent slabs are depth hoar or facets surrounding a deeply buried crust. Deep Persistent Slabs are typically hard to trigger, are very destructive and dangerous due to the large mass of snow involved, and can persist for months once developed. They are often triggered from areas where the snow is shallow and weak, and are particularly difficult to forecast for and manage.

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.