Boletín de aludes

Waterton Lakes

Jan 11 – 14, 2013Parks Canada
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Archivado · caducó 14 years ago

Peligro de aludes

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

The recent storm brought 40 to 50 cm of low density snow with very little wind. Forecasters are working to gather more information concerning the Jan 5 layer and until more is known conservative terrain choices are advised. Great skiing!

Problemas de aludes

  • Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1–3
    Jan 5 Surface Hoar/ Suncrust layer is now buried 60 to 90 cm. Extra caution on sheltered North and East aspects. Dig down to identify this layer and avoid  steep or unsupported slopes where it is present. Triggering this layer would be serious.

  • Loose Dry

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1
    Surface sluffing on slopes over 35 degrees. Manage this carefully within the group by not skiing above other skiers and avoiding terrain traps and gullies or confined terrain. This should decrease with settling over the next few days.

Weather Forecast

A ridge of high pressure will dominate for the period with a generally cool, sunny, dry, North Westerly pattern with light winds. A few cm of new snow are expected Friday. Dry conditions Saturday and Sunday.

Snowpack Summary

50 cm low density storm snow above 1500m with little wind effect or slab formation. The Jan 5 interface is now down 70-90cm with a 30-40 cm soft slab immediately above it. This interface produced Moderate to Hard test results on Surface Hoar in sheltered N and E locations. Suncrust exists at this interface on steep S aspects. 290 cm at treeline

Avalanche Summary

Limited Visibility continues. Skiers will experience sluffing in steep terrain. Skier triggering is possible on the Jan 5 interface. Forecasters have been making conservative terrain choices while gathering more information about this layer.

Confidence

Due to the number of field observations

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