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Avalanche Forecast

Archived

Dec 30th, 2021–Dec 31st, 2021

Alpine
Natural avalanches unlikely, human triggered possible.
Treeline
Natural avalanches unlikely.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.
Alpine
Natural avalanches possible, human triggered probable.
Treeline
Natural avalanches unlikely, human triggered possible.
Below Treeline
Natural avalanches unlikely.

Regions

Little Yoho.

Another bitterly cold, clear, calm day on Friday before winds pick up for the weekend.

Weather Forecast

Expect temperatures Friday AM to be around -30C with clear skies and light winds. On Saturday winds will really pick up midday and last for the weekend with some warming temperatures. Temperatures and winds drop again for next week.

Snowpack Summary

10-40 cm of snow last week and recent wind from various directions has developed wind slabs in the alpine. There is 80-100+ cm over the Dec. 2 crust/facet combo in Little Yoho which exists below 2200m and are monitoring closely. HS at treeline is 180-260cm

Avalanche Summary

Nothing observed in Little Yoho. There was a skier triggered size 2 avalanche below treeline in Kootenay today, likely on the Dec.2 cust/facets which have not been as of yet a problem in the Little Yoho region. Ski hills to the East were reporting wind slab activity to size 2.

Confidence

Timing, track, or intensity of incoming weather system is uncertain on Saturday

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.