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Avalanche Forecast

Archived

Nov 13th, 2019–Nov 14th, 2019

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

Little Yoho.

Many early season hazards exist, related to thin snowpack coverage. Be on the lookout for windslabs in lee areas in the alpine.

Weather Forecast

Cloudy with no snow Thursday with wind increasing to strong velocity from the SW by the evening. Light snow developing on Friday with stronger winds that could bump up the hazard rating slightly.  Another pulse of snow is expected on Saturday. 

Snowpack Summary

10-20 cm of recent storm snow sits over the November 8 crust and a variety of old wind slabs in the alpine. The Nov 8 crust is present up to 2400 m. Faceting observed around the Oct crusts near the ground. Treeline snow depths range from 50-80 cm, and up to 110 cm in lee areas.

Avalanche Summary

No avalanches observed or reported Wednesday.

Confidence

Due to the number and quality of field observations on Wednesday

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.