Bollettino valanghe

Sea To Sky

Jan 14 – 15, 2012Avalanche Canada
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Archiviato · scaduto 15 years ago

Pericolo valanghe

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

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–4
    Wind slabs may bond poorly to a hard icy crust and be easy to trigger. Be alert for wind slab development in unusual locations as winds change direction over the next few days.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    1–3
    Loose dry snow is likely to sluff easily in steep terrain.

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain on Monday

Weather Forecast

Overnight Saturday: Another 5-10cm should bring storm snow amounts to 20-30cm.Sunday: Flurries. Cold temperatures, with the freezing level near valley floor. Northerly winds.Monday/Tuesday: Two main influences will battle for control of the region's weather: cold arctic air and a low pressure centre near Vancouver Island with an associated westerly flow. Expect some flurries, cold temperatures and the chance of strong outflow (northerly or easterly) winds if the arctic air dominates.

Avalanche Summary

No new avalanches have been reported.

Snowpack Summary

Treeline snowpack depths are around 250cm.New snow has been shifted into wind slabs overlying a hard crust, which is topped by surface hoar in some locations. It may be easy to trigger slabs on this interface, which is most prevalent below 1900m. Deeper in the snowpack, a series of old storm snow layers and wind slabs have generally bonded well to each other and are now gaining strength, with hard results in snowpack tests.Concern for lower snowpack layers has diminished and remains only in shallow snowpack areas. Facets associated with a crust from mid-December and/or sugary facets at the base of the snowpack may still be a concern in shallow areas. Cornices are large and have shown fragility recently.

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