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Avalanche Forecast

Archived

Nov 26th, 2018–Nov 27th, 2018

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

Lizard-Flathead.

This time of year observations are limited, so make sure to supplement this forecast with your own observations. If you've been out please post your observations to the Mountain Information Network MIN.

Confidence

Low - Due to the number of field observations

Weather Forecast

MONDAY: Mainly cloudy with isolated flurries/ Alpine temperature 0 / Light to moderate southwest wind / Freezing level 1500 mTUESDAY: Mainly cloudy with isolated flurries / Alpine temperature -1 / Light to moderate southwest wind / Freezing level 1400 mWEDNESDAY: mainly cloudy / Alpine temperature -2 / Light west wind / freezing level 1200 m

Avalanche Summary

Reports from Friday show a natural avalanche cycle during the Friday overnight period as well as explosives control in the Fernie area producing numerous storm slab releases reaching up to size 2. There have been no new reports of avalanche activity since then.

Snowpack Summary

New snow at the end of last week buried a recently formed layer of weak, feathery surface hoar. South and southwest winds have since redistributed the new snow. A mixed layer of melt-freeze crusts and sugary facets sits near the base of the snowpack. The snowpack is deepest in the alpine and at tree line, where you might now expect to find total depths of around 70 cm. These depths taper rapidly at lower elevations.

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.