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Avalanche Forecast

Archived

Dec 2nd, 2019–Dec 3rd, 2019

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

South Rockies.

Caution as you transition into wind exposed terrain. Avalanches are possible in alpine terrain where wind slabs have formed.

Confidence

Moderate - Uncertainty is due to the limited number of field observations.

Weather Forecast

The notable feature in the weather forecast for the next few days is very high winds at upper elevations.

MONDAY NIGHT - Mainly cloudy with isolated flurries / southwest winds, 30-60 km/h / alpine low temperature near -8

TUESDAY - Mainly cloudy with isolated flurries / southwest winds 40-80 km/h, gusting to 100 km/h / alpine high temperature near -5

WEDNESDAY - Mainly cloudy with flurries, 5 cm / southwest winds, 30-70 km/h / alpine high temperature near -4

THURSDAY - Cloudy with sunny periods / southwest winds, 20-30 km/h / alpine high temperature near -3

Avalanche Summary

There have been no recent avalanches reported in the region. If you are getting out into the mountains, let us know what you see by posting to the Mountain Information Network!

Snowpack Summary

Ongoing strong westerly winds are likely creating wind slabs at upper elevations. Snowpack depths are highly variable this early in the season with amounts ranging between 50-100 cm at higher elevations, and tapering rapidly below treeline. A crust has been reported in the middle of the snowpack. 

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.