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Avalanche Forecast

Archived

Jan 19th, 2021–Jan 20th, 2021

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.

A surface crust may make for difficult travel conditions.

Confidence

High -

Weather Forecast

TUESDAY NIGHT: Flurries, trace, strong to extreme ridgetop wind easing to light northwest, freezing level 800 m.

WEDNESDAY: Mostly cloudy, light ridgetop wind, treeline temperature around -3, freezing level 1000 m.

THURSDAY: Mix of sun and cloud, light to moderate easterly wind, freezing level 1000 m.

FRIDAY: Sunny, light northeast wind, freezing level 800 m.

Avalanche Summary

No new reports.

Snowpack Summary

A widespread crust caps the snow surface. The exception may be higher elevation north-facing slopes, where there could be roughly 10 cm of snow sitting above crusts. There could be some weak faceted snow forming around these crusts, but avalanches on this layer are unlikely at this point. The lower snowpack is a well consolidated multi-tiered sandwich of crusts and moist snow.

Watch North Shore Rescue's weekly snowpack conditions update from Friday here.

Terrain and Travel

  • A crust on the surface will help bind the snow together, but may make for tough travel conditions.
  • Pay attention to isolated alpine features as well as cross-loaded features at treeline.

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.