Bulletin d’avalanche

South Columbia

Apr 12 – 13, 2016Avalanche Canada
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Archivé · expiré 10 years ago

Danger d’avalanche

Thu
Fri
Alpin
Sans niveau
Limite forestière
Sans niveau
Sous la limite
Sans niveau
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Points saillants

Spring Conditions. Forecast new snow and wind will bring back that winter feeling in the mountains. Watch for new wind slabs that may not bond to the old hard surface.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    Forecast new snow and wind may develop new wind slabs in the alpine and at treeline. New wind slabs may not bond well to the old surface crust.

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–4
    Forecast cloud, light snow, and cooler temperatures may reduce the likelihood of natural cornice falls.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Forecast cooler temperatures and cloud cover should reduce the likelihood of loose wet avalanches. Lower elevations may be reactive during the heat of the day.

Weather Forecast

Strong southwest winds and light snow overnight with freezing levels dropping down to 1500 metres. Light winds on Wednesday with a mix of sun and cloud, and a chance of some convective flurries. Freezing levels rising up to 1800 metres during the day. Freezing down to about 1400 metres by Thursday morning under mostly clear skies. Sunny with light northerly winds on Thursday and freezing levels rising up to 2000 metres. Mostly cloudy on Friday with scattered flurries.

Avalanche Summary

On Monday we had a report of a natural cornice fall size 2.5 from a north aspect at 2350 metres in the Selkirks. One natural size 3.0 avalanche was reported from a southeast aspect in the alpine that released at 2700 metres and ran about 1000 metres; this occurred in the southern Selkirks on Sunday. Most commercial operations have closed for the season, and data is becoming sparse.

Snowpack Summary

The snow surface is currently going through a typical spring melt-freeze cycle on all aspects and at all elevations, except possibly high true-north slopes which could be holding onto cold snow. The strength (thickness) of the surface crust and how quickly it breaks down during the day are important factors to focus on. Forecast wind and snow may bring back a winter feel above treeline for a day or two. Watch for new wind slabs that may not bond to hard old surface crusts.

Régions couvertes