Bulletin d’avalanche

South Rockies

Dec 4 – 5, 2019Avalanche Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

Fri
Sat
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible

Points saillants

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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2

    Recent strong winds have likely been forming new wind slabs, which sit on sugary faceted snow. Use caution in wind-affected terrain.

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 (check out this MIN report from Imperial Ridge). A crust has been reported in the middle of the snowpack.

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.

Tuesday night: Cloudy, scattered snow with 3-5 cm possible, southwest winds 40-80 km/h, gusting to 100 km/h, alpine temperature -5 C, freezing level around 1400 m.

Wednesday: Cloudy, scattered snow with 3-5 cm possible, southwest winds 40-80 km/h, gusting to 95 km/h, alpine high temperature -4 C, freezing level around 1500 m.

Thursday: Cloudy with periods of sun, isolated flurries with 2-4 cm possible, southwest winds 20-40 km/h, alpine high temperature -3 C, freezing level around 900 m.

Friday: Mix of sun and cloud, isolated flurries with a trace of accumulation, southwest winds 30-50 km/h, gusting to 95 km/h, alpine high temperature -2 C, freezing level around 1700 m.

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!

Régions couvertes