Bollettino valanghe

Kananaskis

Feb 22 – 23, 2015Alberta Parks
Vedi sulla mappa
Archiviato · scaduto 12 years ago

Pericolo valanghe

Tue
Wed
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

There is still good skiing to be had on sheltered polar aspects.  Watch out for reverse loaded slopes and keep an eye out for rising temps.  PW

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    Some of these have occurred due to reverse loading, from northerly winds.  Slabs up to 30cm have been formed in the immediate lee of ridgelines. 

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    The previously formed wind slabs are still lurking under the latest snow.  Keep an eye out for this in the alpine and exposed treeline elevations on steeper features.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    3–5
    Keep an eye out for cornices as possible large triggers, especially when the sun comes out and the temps begin to rise.  This basal weakness is still on our radar.

Confidence

Good

Weather Forecast

Tomorrow will see a mix of sun and cloud, but will be warming to near zero in the alpine.  Freezing levels are expected to climb to 2200m.  The winds will be light from the north.

Avalanche Summary

There were numerous skier initiated sluffs in steep(>40) terrain, but the sluffs were not running far and slowed to where the angle eased to 35deg. or less.

Snowpack Summary

The storm snow has settled dramatically on southern aspects due to solar effect, but up to 12cm of low density snow remains on the surface on polar aspects.  There has been evidence of reverse loading wind effect at upper exposed treeline and alpine elevations and soft slabs have formed in the immediate lees of features at these elevations.  A test pit today at treeline elevations showed the upper snowpack to be healing and gaining strength.  The pit was in a sheltered area, but exposed areas at this elevation have seen some wind.  The mid-pack is gaining strength but weak facetted grains still dominate the base of the snowpack.  At 2400m there is a discernable crust on solar aspects and 2100m and below there is a crust on all aspects under the most recent snow. 

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