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Avalanche Forecast

Archived

Jan 28th, 2020–Jan 29th, 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 possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

Ridge-top winds continue to create slabs in lee and exposed features. Steep, unsupported slopes should be treated with caution, especially if the surface feels stiff underfoot.

Weather Forecast

Weak storms the next 3 days, then a warm whopper Fri/Sat.

Today: Isolated flurries, alpine high -6*C, fzl rising to 1300m, light SW winds

Wed: Flurries, 5-10cm snow, alpine high -6*C, fzl rising to 1300m, mod/strong SW winds

Thurs: Flurries, 10cm snow, alpine high -6*C, fzl 1200m, mod/strong SW winds

Fri:/Sat Snow, 55cm, alp high -1*C, fzl 1900m

Snowpack Summary

Periods of moderate to strong southerly winds have created pockets of windslab on lee features, especially on northerly aspects. The mild temps are promoting settlement in the upper snowpack.

Avalanche Summary

Saturday, skiers in the Forever Young couloir (a high, northerly aspect) triggered a size 2 avalanche which resulted in partial burials and serious injuries. Skiers also triggered avalanches on NRC (cross-loaded slope), Video Peak and Grizzly Couloir (sun crust) this past week.

Confidence

Due to the number of field observations

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.