Bulletin d’avalanche

Kananaskis

Nov 11 – 12, 2015Alberta Parks
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Archivé · expiré 11 years ago

Danger d’avalanche

Fri
Sat
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

The question for tomorrow will be when and how strong the winds become in the afternoon. At treeline especially, watch the wind pattern and have alternate plans if the winds pick up early.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    At the moment the lack of wind has kept slab development limited to the alpine. Once the wind picks up, slabs will form quickly at alpine and upper treeline elevations. Buried slabs are likely to be triggered by people in steep, unsupported slopes.

  • Loose Dry

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2
    Relatively cold snow is arriving with little wind. We can expect steep slopes to sluff easily. Ice climbers, watch the terrain above and avoid exposure to gullies.

Confidence

Fair - Timing of incoming weather systems is uncertain

Weather Forecast

As a significant system approaches, we can expect flurries and moderate to high winds along the divide. Accumulation for the next 24hrs is forecast to be minimal, but local amounts will vary. The winds will come out of the SW for the next 48hrs. Alpine winds will be in the strong to extreme range with sustained gusts to 75km/hr as of tomorrow afternoon. We are expecting an abrupt change(for the worse) in the weather early tomorrow afternoon. Temperatures will also rise as the day progresses. A high of -6 is expected.

Avalanche Summary

Nothing new was seen today, but visibility was marginal.

Snowpack Summary

The surface hoar that had been developing over the last few days has now been buried by a fresh layer of snow. At the moment this surface hoar layer is only down 3-8 cm's and is somewhat unknown in terms of its location within the terrain. Below the surface hoar, existing windslabs are still intact and potentially reactive in steep, crossloaded alpine terrain. The recent flurries have now pushed the treeline and below treeline amounts within threshhold. Avalanche problems, notably loose dry avalanches, may be encountered in specific terrain (steep gullies or wind exposed areas). We can also start to expect fresh cornices at ridge lines.

Régions couvertes