Bulletin d’avalanche

Jasper

Dec 9 – 10, 2015Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

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

Allow the storm snow to settle and bond for a few days.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    30 cm since Dec 5th and another 10-25 cm tonight accompanied by SW winds leading to storm slab formation. The Dec3  surface hoar layer will be down 60cm if this snow arrives. It warrants careful investigation.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–3
    A warm storm may translate to rain at lower elevations on an already warm snowpack. Loose wet condition is possible but will be short lived as freezing levels drop.

Weather Forecast

10-25cm is expected tonight with warm temperatures and potentially rain at lower elevations. Winds will be moderate to strong SW then taper off after the storm. Freezing levels will be around 2000m during the storm then drop Wednesday.

Snowpack Summary

30cm of snow since the 5th and another 10-25cm arriving tonight coming in warm. It appears to be bonding well to a previous breakable sun crust on steep solar aspects. The Dec3 surface hoar can be found in isolated sheltered locations at treeline. The snowpack is shallow and faceted below treeline, more supportive above 1900m.

Avalanche Summary

The Icefields was described as driving through pea soup thus visibility was poor. Expect some natural activity in the alpine with this storms input.

Confidence

Forecast snowfall amounts are uncertain on Wednesday

Régions couvertes