Bulletin d’avalanche

Jasper

Mar 21 – 22, 2016Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Wed
Thu
Alpin
2 · Modéré
Limite forestière
3 · Marqué
Sous la limite
3 · Marqué
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Points saillants

Increasing hazard possible over the day with a strong solar input. It is not a certainty but it's important to be aware of the rapid changes as we move into the spring.

Problèmes avalancheux

  • Cornices

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–4
    First indicators of this problem showing up. Easy enough to avoid but, larger slides, triggered in the deep weaknesses can quickly become a significant issue for groups traveling in the valley bottoms or run outs.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    2–3
    This problem is still a concern in the Whistler/Portal Creek area. This, along with most recent rain means this area will be in very poor shape for travel. 

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Freezing level expected to remain at treeline for Monday evening. If this is the case, the snowpack will be further weakened and hazard will continue to increase if daytime temperatures get above 0 degrees or with a strong solar input.

Weather Forecast

Mild temperatures with freezing levels remaining at treeline and poor overnight recovery (re-freezing). Continued flurries through the evening Monday with rain or freezing rain possible below 1500ms. Tuesday afternoon is forecasting a break in the clouds as winds shift from the north and daytime temperatures drop.

Snowpack Summary

Rain soaked to 2000m with wet flurries to TL on all aspects. Generally, the snowpack is shallow and poorly consolidated with significant variation within the forecasting area. The persistent slab was found to be most active in Portal Creek and surrounding area off the ski hill. This layer will be triggered from thin spots on the slope.

Avalanche Summary

Poor visibility throughout the forecast region. Nothing new to report.

Confidence

Timing or intensity of solar radiation is uncertain

Régions couvertes