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Avalanche Forecast

Archived

Mar 19th, 2022–Mar 20th, 2022

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

South Coast.

Carefully assess the wind slab hazard as you move through terrain. Wind slab hazard increases with elevation.

Confidence

Moderate -

Weather Forecast

Saturday night: flurries bringing trace amounts of new snow with moderate westerly winds. Low of -3 at 1200m.

Sunday: mostly cloudy with up to 10cm of snow. Freezing level around 900 m. Light southerly winds.

Monday: stormy with up to 25 cm of snow. Moderate southerly winds and freezing levels around 1300 m.

Tuesday: cloudy with 10 cm of new snow at higher elevations. moderate southerly winds and freezing levels rising to 2100 m.

Avalanche Summary

Natural and human triggered wet loose and dry loose avalanches up to size 1.5 have been observed in the region over the past few days. We suspect storm and wind slab avalanches will be reported on Saturday.

Snowpack Summary

Wind slab can be found on northerly aspects at higher elevations. The upper snowpack contains several crust layers that can likely be found on all aspects and elevations except high north terrain. The snowpack is considered well-settled and strong below these crusts. 

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Use ridges or ribs to avoid areas of wind loaded snow.

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.