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Avalanche Forecast

Archived

Apr 1st, 2022–Apr 2nd, 2022

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

Regions

Banff Yoho Kootenay.

Pacific Systems are set to bring some light precipitation our way through the weekend, and even more into next week...

The potential for a poor freeze, and possibly rain, may lead to a deterioration in the crusts BTL as early as Saturday. 

Weather Forecast

Overcast skies Fri Pm may serve to limit the quality of the freeze. Saturday a cold front and associated convective cloud will bring flurries above about 1800m, possibly rain below. A good freeze can be expected Sun AM before a low pushes through in the afternoon. Again, light rain below about 1800m is possible. Weak freeze Mon AM with more precip.

Snowpack Summary

Isolated thin wind slabs exist in the alpine : mostly noted in the immediate lee of features. Surface melt-freeze crusts exist on all aspects up to approx. 2300m and higher on solar aspects. On high elevation north aspects dry snow exists. The mid-pack is well settled but has several persistent layers consisting of crusts and/or facets.

Avalanche Summary

In the alpine, a few 1.5 thin windslabs were ski cut/triggered in the region on Thursday. A fresh size 3 avalanche was observed on the main highway path on Mt. Stephen on Wednesday. This was likely serac triggered.

Confidence

Intensity of incoming weather systems is uncertain on Sunday

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.

Loose Wet

Loose Wet avalanches are the release of wet unconsolidated snow or slush. These avalanches typically occur within layers of wet snow near the surface of the snowpack, but they may quickly gouge into lower snowpack layers. Like Loose Dry Avalanches, they start at a point and entrain snow as they move downhill, forming a fan-shaped avalanche. Other names for loose-wet avalanches include point-release avalanches or sluffs. Loose Wet avalanches can trigger slab avalanches that break into deeper snow layers.