Bollettino valanghe

Banff Yoho Kootenay

Nov 6 – 7, 2019Parks Canada
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Archiviato · scaduto 7 years ago

Pericolo valanghe

Thu
Fri
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
Senza grado

In sintesi

New snow and strong winds have created areas of wind slab, avoid steep gullies or convex rolls.

It's still early season, ski and ride with care as rocks, stumps and open creeks would be an easy way to end the season.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–2

    Strong winds and the new snow  has created pockets of wind slab in the alpine and possibly into treeline, burying some small older wind slabs. Watch for wind affected areas in steep terrain while climbing or skiing.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–1.5

    Ice climbers and skiers should be aware of the potential for loose snow avalanches in steep gullies as new snow and strong winds provided rapid loading in steep alpine terrain.

Weather Forecast

A cold front is pushing into region and will drop temps as low as -20 and another 5cm of snow by wednesday morning. Wednesday will see a slight clearing trend, no new snow, moderate Westerly winds with a daytime high of -5. Another storm system approaches on Thursday evening and is forecasted to bring 10cm of snow, strong winds and rising temps.

Snowpack Summary

10-20cm of new snow in the past three days with gusty alpine winds up to 85km/hr. Treeline snow depths range from 40-60 cm with up to 100 cm in the lee features. In general the snowpack is still thin, weak and highly variable in depth. An October crust has been providing support to help ski travel. Limited snow below treeline.

Avalanche Summary

Received a third hand report of a full burial in the Observation Peak area on Sunday afternoon, no injuries. A couple dry loose avalanches up to size 1.5 were observed Monday in steep alpine gullies near Bow Lake and a small natural wind slab observed in alpine terrain near Bow Summit. Limited visibility on Tuesday obscured our avalanche patrol.

Confidence

Due to the number and quality of field observations

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