Bulletin d’avalanche

Kananaskis

Feb 21 – 22, 2014Alberta Parks
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Archivé · expiré 13 years ago

Danger d’avalanche

Sun
Mon
Alpin
4 · Fort
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
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Points saillants

The new snow load is the question right now. Given the touchy snowpack, even a light load will tip the scales and cause a natural cycle. It would be fair to place treeline at the upper end of Considerable right now. Not the time to push terrain.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–3
    There are pockets of windslabs evident from last week's wind event. They are expected to be found at open tree line areas and lower alpine.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely - Very Likely
    Taille
    1–4
    The layers above the Feb 11th layer are gaining strength which has a negative impact on avalanche conditions. Propagations will get larger as the slab density increases. Whumphing and cracking continue at all elevations.

Confidence

Good

Weather Forecast

A bit more snow will accompany the cold front passing through over night. In all we can expect 10cm's by tomorrow. The good news is that this snow is coming in with almost no wind, even in the alpine. Tomorrow's temps will hover around -14 at valley bottom. Trace amounts through the week-end. Light winds throughout the week-end as well.

Avalanche Summary

Today we came across 3 large avalanches that are thought to be from the last 24hrs. The debris was fresh despite the new snow. All 3 avalanches came out of terrain that had previously avalanched. South side of Hero's knob, SE-S asp, alpine start zones, sz2.5.

Snowpack Summary

Steady snow today on the Spray has currently left 4cm's (as of 3pm) with another 6 expected overnight. So far this new appears to be bonding well to the snow from last week. The snow from last week has either settled or been wind distributed to form a cohesive slab. The density of this slab increase with altitude and exposure to wind. The common theme at all elevations/aspects is the extremely poor bond with the snow underneath. Today marks the 7th day since the burial of the facets and there has been no improvement with the bond. On all of our field trips this week we have experienced LOTS of whumphing, cracking and even remote avalanches. The weak layer is made up of facets and in the odd place broken down surface hoar. One of the weaker snowpacks in recent memory. Snow depths are: Burstall Pass-165, Burstall Parking-118.

Régions couvertes