Bollettino valanghe

Northwest Inland

Dec 10 – 11, 2015Avalanche Canada
Vedi sulla mappa
Archiviato · scaduto 11 years ago

Pericolo valanghe

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

In sintesi

The places you are going to find the best riding conditions in the wake of the storm are probably the same places where the danger from a layer of buried surface hoar is greatest.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    2–5
    The new snow is sitting on a buried layer of surface hoar that may be at a critical depth for human triggered avalanches.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    2–5
    Winds shifted from west to east and may have reverse loading mid slope features.

Confidence

Low - Due to the number and quality of field observations

Weather Forecast

The next few storms are tracking to the south and are going to largely miss the Northwest regions. FRIDAY: flurries, light southwest wind, freezing level valley floor SATURDAY: isolated flurries, light east winds, freezing level valley floor. SUNDAY: clear, moderate northwest winds.  Freezing level valley floor.

Avalanche Summary

The layer of buried surface hoar is my biggest concern.  It is probably widespread and is reaching a burial depth that was associated with a rash of skier and remotely triggered avalanches in the deeper snowpack around Terrace last weekend.

Snowpack Summary

Up to 60cms of settled snow now sits upon a layer of buried surface hoar.  This layer has the potential for remote triggering and wide propagations.  It is likely to be lurking in most sheltered areas at tree-line although I suspect it extends well into the alpine.  Variable winds are loading lee features. Below 1500m heavy rains have likely saturated the snow pack and may have formed a new rain crust.

Regioni coperte