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Avalanche Forecast

Archived

Mar 12th, 2022–Mar 13th, 2022

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

Regions

Jasper.

Low hazard means small avalanches may be triggered in isolated areas or extreme terrain. New snow amounts are increasing gradually over the next few days. This may increase the potential for loose snow sliding on a buried crust 10-20cm down.

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 Treeline and below hold 10-20cm of soft snow over top a strong settled mid pack. Most alpine surfaces have been sculpted by previous winds and has a cornucopia of characteristics. A temperature crust down 10-30cm is decomposing and generally below 2300m on solar aspects. A facet and depth hoar layer is at the bottom of the snowpack.

Avalanche Summary

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 was noted next to Curtain Call. Both likely initiated by a brief spike in solar radiation. Thursday and Friday's patrols noted no new avalanches.

Confidence

Forecast snowfall amounts are uncertain on Sunday

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.