Boletín de aludes

Waterton Lakes

Mar 6 – 9, 2022
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Archivado · caducó 5 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
2 · Moderado
Bajo el límite
1 · Débil
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Lo esencial

Storm slabs up to 100cm deep continue to be reactive on interfaces within the slab in snowpack tests. Asses storm slab carefully before committing to lines.

Problemas de aludes

  • Loose Dry

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    1–1.5

    20-30cm of low density snow is reactive to natural and human triggering. Watch for loose dry slides in steep unsupported terrain.

  • Storm Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible
    Tamaño
    1.5–3

    90cm of snow and moderate SW winds has formed slabs in the ALP up to 100cm. At 2050 m temperature interfaces within the storm continue to be reactive in compression tests: CTE 9 down 25 cm resistant planer and CTH 23 down 65 cm below rain crust.

Weather Forecast

Sun: Mix of sun and cloud with isolated flurries. Light gusting moderate W winds. Alpine high -9. Freezing levels valley bottom.

Mon: Cloudy with  flurries in PM, 15cm overnight. Moderate W winds. Alpine high -7, low -11. Freezing levels VB.

Tues: Flurries, accumulating 5cm. Light gusting to moderate NE winds. High -14, low -18. Freezing levels VB.

Snowpack Summary

90cm of snow and mod SW winds formed storm slabs in ALP close to the continental divide. Rain crust found 30 cm down within storm snow up to 2000m. This overlies old windslab 10-30 cm deep. Feb 15 crust, 1 cm thick, exists to treeline all aspects and higher on solar aspects. Well settled midpack. Facets above Dec 4 crust, buried 150-250 cm.

Avalanche Summary

Evidence of a widespread natural cycle: wet loose, wet slab, storm slab avalanches, from this week's storm can be found in most valleys up to size 3. Check Forum Ridge Avalanche to see impressive size 3. Numerous dry loose avalanches up to 1.5 on all aspects in steep terrain. Please submit observations to the Mountain Information Network

Confidence

Timing of incoming weather systems is uncertain

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