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Avalanche Forecast

Archived

Feb 22nd, 2022–Feb 23rd, 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.
Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.

Regions

Little Yoho.

Several reports of skier triggered wind slabs in last day. Exercise caution as you transition into open terrain at tree-line and above.

Weather Forecast

Cold weather will continue on Wednesday and then a warming trend begins on Thursday. For Wednesday valley bottom temps rising to -10 during the day and ridge-top temps rising to -15. Winds will be light from the north-west. Little to no snow forecast through end of week.

Snowpack Summary

Recent storm snow has been redistributed by winds to create widespread wind effect, wind slabs and scoured surfaces in alpine a tree-line elevations. The Jan 30th surface hoar/sun crust layer is variable in distribution, is 40-75 cm down and is producing hard sudden planar results in snowpack tests.

Avalanche Summary

Report of a skier triggered size 1.5 wind slab near Yoho Pass in the alpine. Another report of a skier triggered avalanche (size 1.5) near Vermillion Crossing at treeline. Sunshine skil hill reported several size 1 wind slabs in the alpine. Very little recent natural activity observed.

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.