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Avalanche Forecast

Archived

Mar 11th, 2022–Mar 12th, 2022

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

Regions

South Rockies.

Keep an eye on the weather. Rising freezing levels and strong winds could increase the likelihood of avalanches.

Confidence

Moderate -

Weather Forecast

Friday night: light flurries bringing up to 5cm of new snow and strong southwest winds and a low of -3 at 1900m. 

Saturday: a mix of sun and cloud with the possibility of light flurries early in the morning. Freezing levels around 1800m. . Moderate southwest winds.

Sunday: a mix of sun and cloud with no new snow expected. Light southwest winds and freezing levels rising to 2100m.

Monday: a mix of sun and cloud with no new snow expected. Light to moderate southwest winds and freezing levels around 2100m.

Avalanche Summary

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

New wind slab can be found on easterly aspects in exposed treeline and above. 10 to 20cm overlies a crust on solar aspects and all aspects below 2000m. Moist snow will likely be observed below treeline.

Terrain and Travel

  • Expect slab conditions to change drastically as you move into wind exposed 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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.