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Avalanche Forecast

Archived

Mar 19th, 2022–Mar 20th, 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 Coast Inland.

Carefully assess the wind slab hazard as you gain elevation. Rider triggerable wind slab will likely be found in exposed terrain.

Confidence

Moderate -

Weather Forecast

Saturday night: trace amounts of snow expected in the north and up to 10cm in the south of the region. Light to moderate southwest winds. Low of -8 at 1500 m. 

Sunday: mostly cloudy with moderate southwest wind. Freezing level around 1100 m. 5 cm of new snow expected.

Monday: cloudy with around 5 cm of new snow expected and moderate to strong southwest winds. Freezing level rising to 1800 m.

Tuesday: cloudy with flurries bringing around 5 cm of new snow at higher elevations. Strong southwest winds and freezing levels rising to 2100 m.

Avalanche Summary

On Friday one skier controlled storm slab size 1 was reported in the north of the region. This avalanche ran on the mid march crust, it was on a treeline gully feature on a northeast aspect.

We suspect small natural and human triggered wind slabs will be reported on Saturday.

Snowpack Summary

New wind slab can be found on northerly aspects. a melt-freeze crust exists down 10 to 20 cm on sun-exposed aspects and at lower elevations.  

In the north of the region, a crust/facet interface from February sits 30-60 cm deep and had been most problematic on north to northeast aspects around 1900-2100 m. This layer produced a number of avalanche in early March but is now considered dormant. 

Terrain and Travel

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • Avoid freshly wind loaded features, especially near ridge crests, roll-overs and in steep terrain.

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.