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Avalanche Forecast

Archived

Mar 9th, 2022–Mar 10th, 2022

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.
Below Treeline
Natural avalanches unlikely.

Regions

Jasper.

Cold temps and limited winds have preserved some great conditions through the week. Caution on southerly aspects where slabs may exist on a solar crust.  Cornices have grown large and deserve a wide safety margin.

Weather Forecast

Thursday: Sunny periods. No precipitation. Alpine high -11 C. Wind NW 10-25 km/h. Freezing level (FL) valley bottom.

Friday: Sunny periods isolated flurries. Trace precipitation. Alpine low -14 C; high - 8 C. Wind W 20-30 km/h. FL valley bottom.

Saturday: Isolated flurries. Trace precipitation. Alpine low -9 C; high -6 C. Wind SW 15-35 km/h. FL 1400m

Snowpack Summary

Sheltered areas hold up to 30cm low density snow over top a well settled mid pack. Previous NW winds added to cornice growth and slab development in the alpine. A crust down 25-40cm is decomposing but can still be found below 2300m on south aspects. A widespread weak facet layer still lurks at the bottom of the snowpack in 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

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.