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Avalanche Forecast

Archived

Apr 11th, 2022–Apr 12th, 2022

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

Regions

South Coast Inland.

Wind slabs may be found in steep terrain at high elevations.

Confidence

High - The snowpack structure is generally well understood.

Weather Forecast

MONDAY NIGHT: Mostly cloudy with isolated snowfall, accumulation 1 to 3 cm, 20 to 30 km/h northeast wind, alpine temperature -10 C.

TUESDAY: Cloudy with isolated snowfall, accumulation 1 to 3 cm, 20 to 30 km/h northeast wind, alpine temperature -10 C.

WEDNESDAY: Mostly cloudy with isolated snowfall, accumulation 1 to 3 cm, 10 km/h northeast wind, alpine temperature -10 C.

THURSDAY: Mostly cloudy with isolated snowfall, accumulation 1 to 3 cm, 10 km/h northeast wind, alpine temperature -10 C.

Avalanche Summary

A few small loose avalanches were observed out of steep terrain on Sunday. Otherwise, no recent avalanches were reported.

Looking forward, wind slabs could be triggered by riders out of steep terrain at high elevations. Best to stay well back of cornices too, as they are very large at this time of year.

Snowpack Summary

10 to 20 cm of dry, wind-affected snow sits above a hard melt-freeze crust in the alpine. Wind slabs may be found in lee terrain features in the alpine from recent northeast wind. A surface melt-freeze crust is found at treeline and below, which may moisten during daytime heating.

Various melt-freeze crusts exist in the upper to middle snowpack, which reports suggest are bonding well. There are no deeper concerns at this time.

Terrain and Travel

  • Carefully evaluate steep lines for wind slabs.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.
  • When a thick, melt-freeze surface crust is present, avalanche activity is unlikely.

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.