Bollettino valanghe

South Rockies

Dec 1 – 2, 2014Avalanche Canada
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Archiviato · scaduto 12 years ago

Pericolo valanghe

Wed
Thu
Alta quota
3 · Marcato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

What did you see over the weekend? We welcome your observations. Email forecaster@ avalanche.ca.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–6
    A touchy weak layer is now buried a metre or so down in the snowpack. It may be reactive to the weight of new snow, wind-loading or the additional weight of a skier or sledder. Avalanches on this layer could be surprisingly large.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Recent snow and wind may have left slabs on a variety of slopes. Watch for breakable or stiff-feeling snow, or smooth, bulbous-looking slopes. These may indicate wind slabs.

Confidence

Poor - Due to the number of field observations

Weather Forecast

Synopsis: Fairly static weather pattern, the arctic high pressure centre persists over Southeastern BC for the next few days. The models suggest that cloud and precipitation will push into the southern half of the province Thursday night/Friday. Tuesday: Freezing Level: Valley Bottom; Precipitation: Nil; Wind: Treeline: Moderate, W/SW | Ridgetop: Strong, NWWednesday: Freezing Level: Valley Bottom; Precipitation: Nil; Wind: Treeline: Light, SW | Ridgetop: Moderate WThursday: Freezing Level: Valley Bottom; Precipitation: Nil; Wind: Treeline: Moderate, SW | Ridgetop: Moderate, W

Avalanche Summary

Explosives triggered two very large (size 2.5 and 3.5) slabs in the south of the region on Thursday around treeline. These failed on a weak layer of facets buried about a week ago. We haven't had any newer reports, but I'd expect some further avalanche activity to occur this weekend in response to the recent snow and wind, with the chance of triggering a deeper weakness and creating a very large event.

Snowpack Summary

As we begin our forecasting season, we are working with very limited field data. If you have been out in the mountains, we'd love to hear from you. Please email us at [email protected].Half a metre or so of recent snow is likely to have been redistributed by wind into fresh slabs on lee slopes. Natural avalanches may continue spilling down steep headwalls for a day or two. A weak layer (of facets over a crust) which formed during November's dry spell is now buried a metre or more down. Avalanches failing on this layer have the potential to propagate widely, leading to very large events.

Regioni coperte