Bollettino valanghe

South Rockies

Dec 3 – 4, 2012Avalanche Canada
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Archiviato · scaduto 14 years ago

Pericolo valanghe

Wed
Thu
Alta quota
3 · Marcato
Limite del bosco
3 · Marcato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–4
    Forecast snowfall and extreme winds will create new wind slabs and potentially add to the size and reactivity of existing storm slabs. With expected wind values, loading may take place lower on the slope than normal.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–5
    We have not heard of any new releases on this early season rain crust; however, an avalanche at this interface could be surprisingly large and destructive. This layer may become reactive with warming and/or increased loading.

Weather Forecast

Overnight and Tuesday: Light to locally moderate snowfall / Extreme southwest winds / Freezing level at 1500mWedesday: Light snowfall / Strong to extreme southwest winds / Freezing level at surfaceThursday: Trace amounts of snow / Light southwest winds / Freezing level at surface

Avalanche Summary

No recent avalanche observations.

Confidence

Fair - Due to variable snowpack conditions

Snowpack Summary

A report from near Harvey Pass tells us that there is about 25 cms of storm snow that is "damp" at treeline and the ski penetration is only about 20 cms. Having said that, recent accumulations have been highly variable throughout the region and more recent strong winds have most likely redistributed surface snow into pockets of windslab at higher elevations. Continued windslab development is expected with forecast weather.The November crust was found to be buried down about 60 cms and was associated with a layer of facets either directly above or below. In general, snowpack data is sparse in this region and significant variations likely exist from one drainage to another. In short, digging down and making your own observations will be critical to safe slope selection. Any observations from the field are welcome at [email protected].

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