Bulletin d’avalanche

Northwest Inland

Jan 12 – 13, 2012Avalanche Canada
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Archivé · expiré 15 years ago

Danger d’avalanche

Sat
Sun
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    Old windslabs are settling and becoming more stubborn to human triggers. Watch for tender cornices as the potential trigger for a release on the slope below. New windslabs will most likely be small and isolated to pockets of lee terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–6
    Persistent slabs are getting harder to trigger but still exist in many locations.

Weather Forecast

Friday: 5cm of snow / Moderate to strong southwest winds / Freezing level @ surfaceSaturday: Trace amounts of snow / Light to moderate northerly wind / -12.0 @ 1500mSunday: Mostly clear skies / Light northerly winds / -20.0 @ 1500m

Avalanche Summary

1 size 3 natural was reported in the high alpine in the Burnie Glacier area on tuesday. There was also a size 2 reported in the same area at treeline. Both of these avalanches were triggered by natural cornice fall.

Confidence

Fair - Intensity of incoming weather is uncertain on Friday

Snowpack Summary

Heavy rain up to about 1000 metres on Saturday night ended around 0800 Sunday. Cooling since the storm has created a rain crust up to about 1200 metres. There is about 235 cm at 1500 metres. There is an old rain crust that is buried down about a metre that is knife hard and showing old facets above and below. The snowpack is well settled below the rain crust down to the ground. The snowpack in the alpine is highly variable. Strong winds with almost every storm this winter have scoured ridges and knolls down to bare ground, and exposed boulders on some slopes.

Régions couvertes