Boletín de aludes

Jasper

Nov 20 – 21, 2015Parks Canada
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Archivado · caducó 11 years ago

Peligro de aludes

Fri
Sat
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
2 · Moderado
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Lo esencial

For skiers, alpine wind slabs will be your greatest concern, watch for rocks and other buried hazards at treeline. Ice climbers will need to evaluate snow loading above their climbs. Enjoy the early season conditions!

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–3
    After the storm, northerly alpine winds reverse loaded lee aspects. Strong winds since yesterday have been forming new wind slabs on lee aspect slopes. These slabs are sitting on a weakness at the ground, full depth avalanches are possible.

  • Loose Dry

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    50-70 cm of unconsolidated snow is sitting on steep terrain. Expect point releases from cliffs and steep smooth surfaces. Wind, sun and other triggers could release this snow and be enough mass to bury a person or push an ice climber off.

Weather Forecast

Little precipitation is expected through the weekend.  Temperatures will slowly moderate.  Winds are expected to continue moderate from the SW.  Clearing skies will make for beautiful early season conditions.

Snowpack Summary

Tuesday's storm brought up to 60cm. Snow depths vary between 70 to 140 cm in the Icefields. Generally unsupportive conditions below treeline and improving as you approach TL and above. Strong gusty SW alpine winds have formed slab conditions on lee aspects. Previous northerly winds have reverse and cross-loaded alpine slopes.

Avalanche Summary

Explosive work on Parkers slabs on Wednesday produced avalanches up to size 2.5. Wide propagations were observed. Numerous natural avalanches up to size 3 within last 48 hours were noted in the alpine mainly on lee steep slopes.

Confidence

Due to the number of field observations on Friday

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