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Avalanche Forecast

Archived

Mar 24th, 2022–Mar 25th, 2022

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, 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

Jasper.

Fresh wind slabs at tree line and above still require careful assessment. As always in the spring, pay attention to how hot it's getting, and how strong the sun is.

Weather Forecast

Friday: Cloudy with sunny periods. Nil Precip. High -3 C. Ridge wind southwest: 10-20 km/h. Freezing level: 1800 metres.

Saturday: Flurries 9 cm. Low -5 C, High -1 C. Mostly light ridge wind. Freezing level: 2100 metres.

Sunday: Flurries 10 cm. Low -3 C, High 0 C. Ridge wind southwest: 15 km/h gusting to 50 km/h. Freezing level: 2200 metres.

Snowpack Summary

5-10cm low density new snow, redistributed by strong SW winds, overlies yesterday's sun crust and melt-freeze crusts up to 2100m (1-10cm thick elevation dependent).

Snow pack below 1700m is either wet or refrozen depending on the time of day and the solar input.

Avalanche Summary

Over the last 48hrs there has been a widespread wet loose avalanche cycle mostly tree line and below off steep, rocky, and shallow features. Also several wind slabs up to size 2 have been noted in the alpine. One wet loose avalanche on Tuesday caused by rockfall on Polar Circus caught two climbers resulting in serious injures.

Confidence

Freezing levels are uncertain

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.