Boletín de aludes

Banff Yoho Kootenay

Nov 29 – 30, 2015Parks Canada
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Archivado · caducó 11 years ago

Peligro de aludes

Sun
Mon
Alta montaña
1 · Débil
Límite del bosque
1 · Débil
Bajo el límite
1 · Débil
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Lo esencial

Despite the fact that a well settled snowpack exists in most areas there are still some tricks out there. Be aware of  what the inversion may be doing to the terrain above you and remember that windslabs may still release in isolated areas. TH

Problemas de aludes

  • Wind Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Unlikely - Possible
    Tamaño
    1–2
    Small wind slabs are possible in isolated locations, perhaps providing a surprise during otherwise good conditions. The main concern is for terrain traps (above cliffs, gullies) where small avalanches have bigger consequences.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–2
    With alpine temperatures only dropping a little below freezing overnight, we expect still expect solar triggered sluffing on Sunday.

Weather Forecast

Clear conditions with light winds and very warm alpine temperatures are forecast for Sunday and Monday with alpine temperatures remaining near freezing in the evenings. In sheltered sunny locations temperatures will return to well above freezing during the middle of the day. A temperature inversion will keep the valley bottoms cool.

Snowpack Summary

Strong temperature inversions have allowed sun crust formation on solar aspects TL and above while faceting continues TL and below. Expect to find widespread and variable windslabs in open areas at tree line and above. Isolated wind slabs that overly the typical Rockies facets can still be expected in thin areas.

Avalanche Summary

Some small solar triggered sluffs to size 1 observed on Friday. One older size 3 natural avalanche was also observed on the White Pyramid Glacier. This appears to have slid during the last major wind event a few days ago. In places it stepped down to glacier ice showing that on high North aspects there can be a basal weak layer to keep in mind.

Confidence

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