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Avalanche Forecast

Archived

Mar 10th, 2021–Mar 11th, 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, human triggered possible.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Glacier.

New wind slabs have been created in the Alpine. Watch for them as you transition into your descent line.

S'ly aspects were recently baked by the strong March sun, creating a breakable crust well into the Alpine.

Weather Forecast

Daytime convective flurries will cruise through Rogers Pass today, followed by sun and cloud the next couple of days.

Today: Cloudy with isolated flurries and sunny periods, Alp high -8*C, light/mod W winds

Thurs: Sun and cloud, Alp high -8*C, light W winds

Fri: Sun and cloud, Alp high -2*C, light SW winds

Snowpack Summary

A dusting overnight (~5cm) has covered up a breakable suncrust on SE through W aspects, while N'ly aspects remain soft and dry. Yesterday's afternoon winds created isolated wind slabs in immediate lee areas and ridge crests.

Avalanche Summary

Several small, solar-induced avalanches to sz 1.5 were noted from steep, rocky S'ly aspects. Explosive testing at the W end of the park resulted in one sz 2 thin wind slab avalanche from 14 rounds in total. A icefall-triggered sz 2.5 was observed in steep, glaciated terrain below Mt Jupiter; the icefall did not trigger any surface slab.

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.