Boletín de aludes

Jasper

Apr 2 – 3, 2016Parks Canada
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Archivado · caducó 10 years ago

Peligro de aludes

Mon
Tue
Alta montaña
3 · Notable
Límite del bosque
4 · Fuerte
Bajo el límite
4 · Fuerte
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Lo esencial

Stay well away from solar exposed ice climbs.  These are failing big.  Plan for early starts and being out of avalanche terrain by mid-day.

Problemas de aludes

  • Cornices

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Possible - Likely
    Tamaño
    1–2
    Increase occurrence of cornice failures are being noted. It can act as a large trigger initiating deep weaknesses plus their sheer mass, whether or not it initiates an avalanche, would be like being hit by a car.

  • Loose Wet

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely - Very Likely
    Tamaño
    1–3
    The problem will remain active over the weekend with freezing levels reaching 2,400m. The danger rating will increase particularly on thin snowpack zones. Loose avalanches can initiate larger avalanches below. 

  • Deep Persistent Slabs

    • Alta montaña
    • Límite del bosque
    • Bajo el límite del bosque
    Probabilidad
    Likely
    Tamaño
    2–4
    This problem is active. When triggered, it will be big with serious consequences. Warm and sunny conditions will increase this danger. Steep sun facing rocks, cornice failures, and loose avalanches from above are on going.

Weather Forecast

The freezing level will be around tree-line overnight. Light precipitation possible overnight on Saturday.  Clear skies with continued warm temperatures on Sunday with Mod to Strong SW winds.  Overcast on Monday  freezing level staying high with some precipitation possible. Similar conditions expected on Tuesday.

Snowpack Summary

Snow conditions are isothermal below 2200m, warm snowpack into the Alpine even on Northerly facing aspects. Persistent slab present at tree line and above. The snowpack at all elevations has a weak base and several mid-pack weaknesses. Many areas below tree line are under threshold especially lower elevations and southerly aspects.

Avalanche Summary

A widespread avalanche cycle continues (beginning on Thursday). Point releases and wet slab avalanches to size 3 running at all elevations primarily on solar aspects. Fewer slides are occurring on northerly terrain.  The Weeping Wall main curtain collapsed in past 48 hrs and we are expecting to see the same thing happen on similar features.

Confidence

Freezing levels are uncertain on Monday

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