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Avalanche Forecast

Archived

Jan 21st, 2021–Jan 22nd, 2021

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.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches unlikely.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Expect wind scouring and wind slabs in exposed terrain. Reports of good riding conditions still exist in sheltered areas.

Weather Forecast

High-Pressure, clear skies, cool temperatures, and light Northerly winds are forecasted today. Alpine temperatures will reach -10c today, and will fall back to near -15 overnight. This weather pattern is forecasted to continue until at least next week!

Snowpack Summary

Previous strong to extreme southerly winds has had widespread wind effect in the Alpine and at Tree Line. In sheltered locations one can find low-density storm snow on the surface; however wind scouring and hard slabs are the norm in many locations at and above TL. The Jan 10 layer is down 40-60cm in sheltered terrain at tree-line and below.

Avalanche Summary

Only 2 new avalanches were observed in the Highway Corridor yesterday. They occurred during the overnight period on Tuesday evening during the significant wind event, where values on MacDonald West Shoulder reached over 140 km/h! One size 1 skier controlled wind slab avalanche was reported on Little Sifton yesterday.

Confidence

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.