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Avalanche Forecast

Archived

Mar 13th, 2020–Mar 14th, 2020

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.

An atypical wind direction may form wind slabs on terrain features that don't often have them. Apply added caution if you find moistening snow as the sun heats it up.

Confidence

High - Confidence is due to a stable weather pattern with little change expected.

Weather Forecast

FRIDAY NIGHT: Partly cloudy, light to moderate east wind, treeline temperature -7 C.

SATURDAY: Clear skies, light to moderate northeast wind, treeline temperature -10 C.

SUNDAY: Clear skies, light to moderate northeast wind, treeline temperature -5 C, freezing level rising to 1000 m.

MONDAY: Clear skies, light to moderate northeast wind, treeline temperature 1 C, freezing level 2000 m.

Avalanche Summary

There have not been reports of avalanche activity in the region since those reported in this MIN. The potential of triggering wind slab avalanches will likely increase as northeast wind continues to load atypical terrain features in exposed terrain.

Snowpack Summary

Wind slabs may be found on all aspects due to variable wind directions. Recent wind has blown from the northeast, forming fresh wind slabs in south to southwest terrain features at higher elevations. In sheltered terrain, about 30 cm of snow may overly a melt-freeze crust and potentially small surface hoar crystals.

The remainder of the snowpack is well-settled. The snowpack depth varies from around 300 to 400 cm around 1200 to 1400 m and tapers rapidly with elevation, with no snow below 700 m.

Terrain and Travel

  • Be aware of highly variable recent wind loading patterns.
  • Be carefull around freshly wind loaded features.

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.