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Avalanche Forecast

Archived

Apr 8th, 2022–Apr 9th, 2022

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

Glacier.

Cool temps will set up the snowpack for fast and firm conditions at lower elevations, but good skiing can still be found on high north aspects.

Watch for pockets of wind slab as you enter your line.

Weather Forecast

Unsettled weather in the wake of Friday's cold front.

Tonight: Scattered flurries (5cm), Alpine low -10*C, Strong Westerly ridgetop wind

Saturday: Sunny periods, High -9*C, Freezing level (FZL) 1000m, Moderate W wind

Sun: Sunny periods/isolated flurries, Low -12*C, High -9*C, FZL 900m, Light NW wind

Mon: Sunny periods, Low -12*C, High -8*C, FZL 900m.

Snowpack Summary

Below treeline the spring snowpack has undergone several melt-freeze cycles.

At upper elevations a dusting of new snow (up to 10cm) overlies a crust on most aspects, except N'rly alpine slopes where it's on settled dry snow.

Persistent crust layers from late March, and the deep persistent Dec 1st crust, may awaken with very large triggers/cornices.

Avalanche Summary

Neighboring operations continue to see sporadic very large avalanches failing on persistent/deep persistent crust layers.

Glide cracks have been on the move lately, with a size 3 glide slab avalanche from a S aspect of Mt. Tupper on Friday, and another size 3 glide slab from the S side of Cheops on Wednesday.

Confidence

The weather pattern is stable

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.

Persistent Slabs

Persistent Slab avalanches are the release of a cohesive layer of snow (a slab) in the middle to upper snowpack, when the bond to an underlying persistent weak layer breaks. Persistent layers include: surface hoar, depth hoar, near-surface facets, or faceted snow. Persistent weak layers can continue to produce avalanches for days, weeks or even months, making them especially dangerous and tricky. As additional snow and wind events build a thicker slab on top of the persistent weak layer, this avalanche problem may develop into a Deep Persistent Slab.