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Avalanche Forecast

Archived

Feb 25th, 2020–Feb 26th, 2020

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

Regions

Jasper.

Very little change happening to the snowpack.

Continue to maintain a DEEP skepticism and PERSISTENT margin of safety when pushing into new or unfamiliar terrain.

Weather Forecast

A trough, developing over the eastern front ranges will draw moderate to strong westerly gap winds (20km/h, gusting to 45 km/h) over the Parkway on Wednesday. Alpine High temperature, -7.

Find the Alberta Rockies weather synopsis here: Mountain Weather Forecast

Snowpack Summary

Daily, trace amounts of new snow, spread irregularly over the region on old hard slab in the alpine. A thin sun/temperature crust on steep solar aspects at treeline and below. The southern forecast region has a supportive mid-pack. Less supportive and poor bridging over a pronounced basal weaknesses in the north; Whistlers/Portal and Maligne area

Avalanche Summary

No new avalanches were observed or reported. Used daily by Forecasters, The Mountain Information Network is your way to share your field trip observations and helps contribute to the daily avalanche bulletin.

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.

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.