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Avalanche Forecast

Archived

Mar 12th, 2022–Mar 13th, 2022

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, human triggered possible.
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.

Regions

South Rockies.

Continue to assess the wind slab hazard as you move through terrain.

Confidence

Moderate -

Weather Forecast

Saturday night: no new snow expected. Light to moderate southwest winds. Low of -8 at 1800m in the north of the region and -2 at 1800m in the south.

Sunday: a mix of sun and cloud with the possibility of light flurries bringing trace amounts of snow in the afternoon. Light southwest winds and freezing levels rising to 1800m.

Monday: a mix of sun and cloud with some light flurries bringing up to 5cm of new snow. Moderate southwest winds and freezing levels around 2100m.

Tuesday: cloudy with light flurries bringing trace amounts of new snow at higher elevations. Light to moderate southwest winds and freezing levels rising to 2200m.

Avalanche Summary

On Saturday ski cutting produced wind slab avalanches up to size 1. Details on these avalanches are limited.

On Thursday several natural wind slab avalanches up to size 2 were observed in the region as well as natural wind slab avalanches up to size 3 in the neighboring Waterton region.

Snowpack Summary

Wind slab can be found on north and east aspects in the treeline and alpine. Some south and west aspects in the alpine are scoured. A crust exists on or near the surface on solar aspects in the alpine and down up to 30cm below 2000m on all aspects.

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Seek out sheltered terrain where new snow hasn't been wind-affected.

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.