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Avalanche Forecast

Archived

Jan 22nd, 2021–Jan 23rd, 2021

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

Avalanche hazard continues to improve, but pockets of unstable snow still exists in isolated terrain features. Safe travel practices are important at all hazard levels.

Weather Forecast

High-Pressure, clear skies, cool temperatures, and light northwest winds are forecasted today. Alpine temperatures will reach -10c, and will fall back to near -12c overnight. With a stationary blocking ridge in place over the BC coast, this weather pattern is forecasted to continue until at least next week.

Snowpack Summary

Strong to extreme southerly winds created widespread wind effect in the Alpine and at Tree Line, characterized by areas of scouring as well as localized hard slabs. In sheltered locations one can find low-density storm snow on the surface. The Jan 10 surface hoar/ crust layer is down 40-60cm in sheltered terrain at tree-line and below.

Avalanche Summary

15 artillery rounds were fired in the highway corridor yesterday for target verification, producing only 2 small size 2.0 avalanches. Natural cornice triggered avalanches to size 2.0 were reported from the Youngs Peak area. Cornice failure likely coincided with daytime warming. Several groups reported skiing steep lines with little to no activity.

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.