Bollettino valanghe

Kootenay Boundary

Mar 25 – 26, 2012Avalanche Canada
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Archiviato · scaduto 15 years ago

Pericolo valanghe

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

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    2–6
    Cornices are very large and may fail with daytime warming. There is potential for triggering deep slabs on underlying slopes.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–4
    With lingering warm temperatures or if the sun pokes out we could see more wet sluffing. These small avalanches may trigger the deeper weaknesses.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    3–8
    The deep nature of the mid-February surface hoar layer makes potential avalanches triggered on this layer large and destructive. Avoid thin snowpack areas where triggering is more likely.

Confidence

Fair - Freezing levels are uncertain

Weather Forecast

Monday: Expect clouds to build, with a chance of flurries late in the day. More accumulations are expected over the extreme eastern edge of the region. Winds remain light southerly with the freezing level reaching 2000m. Tuesday & Wednesday: Mostly unsettled skies, with occasional light flurries and light southerly winds. The lingering cloud cover makes forecasting freezing levels uncertain; we could see anything between 1500-2000m. Expect total accumulations of 10-20cm.

Avalanche Summary

We have reports of loose, moist avalanches being triggered by solar radiation on sunny slopes. A fatal avalanche incident occurred in this region on Wednesday. We will post more details when they become available.

Snowpack Summary

The recent warm, clear weather has left us with an aggressive melt freeze crust on solar aspects well into the alpine while shady, dead north slopes have grown some small surface hoar and remain powdery. Today's predominant cloud cover will likely keep the softening of the crust to a minimum. The recent storm snow (now more than 72 hours old) has settled and bonded quickly. In recent snowpack tests, the early February surface hoar remains well preserved down 100-180cm and continues to yield sudden results. Although unlikely, triggering this layer would yield a very large, destructive avalanche.

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