Bollettino valanghe

Jasper

Apr 15 – 16, 2018Parks Canada
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Archiviato · scaduto 8 years ago

Pericolo valanghe

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

In sintesi

Winter persists for the next 2 days. Avoid traveling or stopping under large slopes or corniced features as they may be sensitive to triggering.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–2
    Overloaded and under tension, new and buried windslab in the Alpine and TL is sensitive to further loads, like more wind, more snow, more sun and, especially riders.

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1.5–2.5
    Large cornices in all areas of the bulletin region. These failures are triggering persistent instabilities and the subsequent avalanches are proving large and destructive. Give these features a lot of room.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1.5–3
    A slab up to 1m thick overlies: weak faceted crystals, and sun crusts (on steep S and W aspects). This problem has been associated with large triggers like cornices and the subsequent avalanches are proving large and destructive.

Confidence

Timing, track, or intensity of incoming weather system is uncertain

Weather Forecast

Scattered flurries to continue for the next 48 hours. Accumulations and loading may vary significantly. Forecasted snow amounts for 25 cm for the Icefields and 20 for Maligne regions. At lower elevations (under 1800m) the snowpack is vanishing and what snow remains is not supportive with warming.  Winds remain light with mod gusts at ridge top.

Snowpack Summary

A further 4cm, with previous HST totals up to 20cm with varied localized amounts as unsettled weather continues. Mod SW winds have certainly overloaded wind slabs and cornices in open areas at TL and ALP. Persistent instabilities (down 40 to 100 cm) are sensitive to large triggers like cornices, especially on N asp slopes at TL and ALP elevations.

Avalanche Summary

Poor visibility in the region today, reported audible (heard, not seen) avalanches in the Icefields.A large (Size 2.5) persistent slab avalanche was reported Saturday, from a N asp in the alpine.Great information being shared daily on Avalanche Canada's MIN Reports for the Maligne, Whistler's Creek and Icefields regions.

Regioni coperte