Bollettino valanghe

Kootenay Boundary

Jan 22 – 23, 2014Avalanche Canada
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Archiviato · scaduto 13 years ago

Pericolo valanghe

Fri
Sat
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole

In sintesi

Problemi valanghivi

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely
    Dimensione
    3–5
    Deep persistent slabs have become much harder to trigger; however, avalanches on deeply buried weaknesses would be highly destructive. Warming over the next few days may be enough to re-activate these layers.

Confidence

Fair - Timing or intensity of solar radiation is uncertain

Weather Forecast

A ridge of high pressure will continue to dominate the region bringing mainly clear skies and dry conditions for the forecast period. On Thursday the freezing level should hover at about 1500m, but another inversion will set in for Friday and Saturday with above freezing alpine temperatures. Winds should remain mainly light and west/northwesterly for all three days.

Avalanche Summary

There have been no new reports of significant avalanche activity although some sluffing continues on steep solar aspects during the warmest parts of the day.

Snowpack Summary

A dusting of new snow overlies a variety of surfaces which include hard, stubborn windslabs in exposed upper elevation terrain, a melt freeze crust on steep, sun-exposed slopes, and well developed surface hoar at treeline and below. Ongoing warm daytime temperatures have promoted settlement within the snowpack, while cool nights have allowed for significant surface faceting.Closer to the ground, below a generally strong and well settled mid pack, there are 2 layers of note: the late November surface hoar, and a crust/facet combo which formed in October. Both of these layers represent a low probability-high consequence scenario. In short, the likelihood of a release at these interfaces is low, but avalanches would probably be very destructive in nature. Possible triggers include cornice fall, significant warming, or thin spot triggering on an unsupported slope in the alpine or at treeline.

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