Bulletin d’avalanche

Kananaskis

Feb 3 – 4, 2015Alberta Parks
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Archivé · expiré 12 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

Hazard ratings may change at a moment's notice if the winds pick up. Consider alpine and treeline ratings to be at their upper limits right now.  Choosing a safe line still requires some assessment and monitoring of changing conditions.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible - Likely
    Taille
    1–3
    These new slabs could become concerning as the winds build. The "touchiness" of these slabs will rise very quickly if the winds pick up, or change direction. Start to look for them when approaching open areas at treeline.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    2–5
    Eastern parts of the region have seen recent activity with this layer. The upper slabs have triggered this weak layer initiating large avalanches.  Despite the lack of activity in the western areas, the problem and concern is still there.

Confidence

Good

Weather Forecast

The flurries that we experienced today are expected to come to an end overnight. There may be a few more cm's accumulation, but nothing too significant. Alpine and ridge top winds will pick up tonight, topping out at 30-50km/hr from the SW. The alpine temperatures will be around -8 as a high.

Avalanche Summary

No avalanches were seen today

Snowpack Summary

15-20cm's of new, low density snow at treeline. The underlying crust is still apparent at all elevations. In most places the crust is breakable despite the new snow. Treeline and below has no significant avalanche concerns at the moment. The warm spell locked the snow in place with the crust. At treeline the picture starts to change. The treeline/alpine transition is a bit more complex. The moderate winds have created soft slabs on all lee aspects. So far the slabs don't extend too far below ridge lines and open areas at treeline where the winds could penetrate the trees. The bond with the underlying layers seems to be hit and miss. Any slab that is on the crust seems to be bonding reasonably well and anything on an old hardslab is slower to come around. Snow depth at treeline averages 160cm's.

Régions couvertes