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Avalanche Forecast

Archived

Mar 13th, 2022–Mar 14th, 2022

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

Regions

Jasper.

Up to 30 cm of new snow forecasted by Tuesday night. It is uncertain how well the storm snow is going to bond to old surfaces.Of most concern are alpine lee slopes and steep solar terrain at tree line and below.

Weather Forecast

Saturday night will be cloudy, flurries, -8C, and light winds. Sunday will have more intense flurries, potentially 7cm of snow, -4C, 1700m freezing level, and light ridge winds. Monday will bring 10cm of snow, -7C, light gusting strong Southwest winds, and freezing level 1600m. Expect scattered flurries and 4cm of snow on Tuesday.

Snowpack Summary

Sheltered areas tree line and below hold 10-20cm of soft snow over top a strong settled mid pack. Alpine snow has been sculpted by previous winds and presents as a variety of surfaces . A temperature crust down 10-30cm is decomposing and generally below 2300m on steep solar aspects. A facet and depth hoar layer is at the bottom of the snowpack.

Avalanche Summary

No new avalanche activity observed on Sunday. On Saturday, one steep loose surface slide was noted in the Mt. Cromwell area at treeline on a due East aspect. It started as a point and gained enough mass by the bottom to be a size 2. Also a small wet loose slides were noted near Weeping Wall. Both likely initiated by a brief spike in solar input.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Monday

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.

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.