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Avalanche Forecast

Archived

Mar 10th, 2022–Mar 11th, 2022

Alpine
Natural avalanches unlikely.
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.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Wind effect tree line and above - sheltered areas still hold great riding conditions. Some uncertainty remains regarding slab sensitivity on solar crust on steep southerly aspects - stay vigilant. Also give a wide berth to mature cornices.

Weather Forecast

Friday: Isolated flurries. Trace precipitation. Alpine high -7 C. Wind SW 20-30 km/h. Freezing level (FL) valley bottom.

Saturday: Scattered flurries. Precipitation 5cm. Alpine Low -11 C; High -7 C. Wind W 20 gust to 50 km/h. FL valley bottom.

Sunday: Sunny periods. Nil precipitation. Alpine Low -11 C; High -6 C. Wind W light to 35 km/h. FL 1400m.

Snowpack Summary

Sheltered areas hold up to 30cm low density snow over top a well settled mid pack. Moderate NW winds adding to cornice growth in the alpine; wind effect tree line and above. A crust down 25-40cm is decomposing and found below 2300m on S aspects. A widespread weak facet layer still lurks at the bottom of the snowpack all areas.

Avalanche Summary

A natural size 2 wind slab was reported on the West aspect of Mt.Wilson. Estimated date March 6-7.

A natural size 2 cornice failure was reported on Mt. Wilcox. Estimated date March 7-8.

Confidence

Forecast snowfall amounts 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.