Bollettino valanghe

Banff Yoho Kootenay

Dec 7 – 8, 2013Parks Canada
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Archiviato · scaduto 13 years ago

Pericolo valanghe

Sat
Sun
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Cold temperatures continue to be the major factor affecting the snowpack today. The snowpack overall is relatively weak and shallow with a deep persistent basal weakness. Early season hazards such as stumps and rocks are near the surface.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2
    Recent storm snow was moved around by northerly winds and isolated wind slabs can be found on all aspects at and above tree line. Use caution in steeper wind affected areas.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–3
    The basal layers of depth hoar and/or the October melt freeze crust are the major weakness in the snowpack and any avalanche will likely fail on, or step down to these layers. Triggering on steep open slopes is still possible.

Weather Forecast

The cold temperatures and clear skies will continue for the next couple days with only slightly warmer temperatures over the weekend. No significant snowfall is expected until the middle of next week however a small system may arrive from the North on Monday bringing cloudy skies and very light amounts of snow.

Snowpack Summary

Continuing cold temperatures means not much active is happening in the snowpack. The surface and basal layers will continue to facet. Snowpack depths at tree line are around 60-70cm.

Avalanche Summary

No new avalanche activity observed today on a flight over the main ranges to Lake O'Hara. A full depth size 2.5 release on a steep planar NW feature at 2400m on Copper Mtn was observed 2 days ago. Likely the northerly winds and cross loading across this slope with the coming of the arctic front was the trigger.

Confidence

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