Bulletin d’avalanche

Jasper

Jan 15 – 16, 2019Parks Canada
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Archivé · expiré 8 years ago

Danger d’avalanche

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

Solar radiation and positive temperatures at  treeline are producing point release avalanche during the heat of the day.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    The wind slabs appear to bonding well to the lower snowpack. Last weeks snow continues to settle and there is only minimal snow transport taking place near ridge line in the alpine.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–1.5
    This problem will only exist in solar facing terrain from early afternoon until sundown. Moist releases and sluffing from cliffs when combined, through entrainment, may have sufficient mass to trigger the deep persistent slab.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–4
    Use caution in shallow snowpack areas where deep weakness might be more reactive to a human load. Build trust slowly in the new snowpack before committing to any large rideable slope.

Weather Forecast

A ridge of high pressure is bringing warm daytime air temperatures to treeline and above. Cold air is still pooling in the valley bottom overnight where the freezing remain well below freezing. This inversion and sunny skies will remain with us tomorrow.A detailed mountain weather forecast is available from Avalanche Canada.

Snowpack Summary

Exposed terrain at TL and above have been hammered with wind. In sheltered terrain the upper snowpack is continuing to settle with warm temps. A generally strong mid snowpack overlies deep persistent weakness' at the bottom of the snowpack. Use caution in shallow areas where these deep weakness might be more reactive.

Avalanche Summary

A team at the Icefields reported numerous small point release avalanches; size 1-1.5 from solar facing slopes near treeline. Inverted temperatures and strong solar radiation will continue to trigger these tomorrowBe a part of the Avalanche Forecasting team by reporting your field trip this weekend on Avalanche Canada's Mountain Information Network.

Confidence

Due to the number of field observations

Régions couvertes