Bulletin d’avalanche

Cariboos

Dec 18 – 19, 2012Avalanche Canada
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Archivé · expiré 14 years ago

Danger d’avalanche

Thu
Fri
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    Wind slabs are able to set up readily at this time due to the amount of low density new snow available for wind transport. Buried wind slabs are reported to exist below some of the new snow in exposed locations, especially on N and E aspects.

Confidence

Fair - Due to limited field observations for the entire period

Weather Forecast

Wednesday: Light snowfall with around 5cm of accumulation, strong southwesterly mountaintop winds increasing to extreme overnight, and freezing levels remaining at or near valley bottoms. Thursday: Moderate snow with 5-10cm of accumulation, moderate southerly winds and freezing levels in valley bottoms. Friday: Light flurries tapering off and clearing throughout the day, light southwesterly winds, and freezing levels remaining in valley bottoms.

Avalanche Summary

Small loose snow avalanches have been from steep terrain in the recent low density storm snow. Due to our limited observations for this region at this time, your avalanche observations are welcome at [email protected]

Snowpack Summary

The upper snowpack comprises deep amounts of unconsolidated snow in sheltered locations, and soft slabs in open, exposed locations. These slabs are most likely immediately behind ridge crests and downslope ribs. There's ample recent snow available to fuel slab development if winds pick up. Overall, the top and mid-snowpack is reported to be settling well. Persistent and Deep persistent instabilities (surface hoar and an early November crust, respectively) located in the middle and near the bottom of the snowpack may still be a concern but there's little recent evidence of them. It is important to know that we have very limited observations for this region. Digging down and making your own observations, especially in thinner snowpack areas, remains a good idea to assist safe slope selection. You're looking for weak layers that pop or drop in stability tests.

Régions couvertes