Bollettino valanghe

Jasper

Mar 18 – 19, 2017Parks Canada
Vedi sulla mappa
Archiviato · scaduto 10 years ago

Pericolo valanghe

Mon
Tue
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
4 · Forte
Apri la mappa completa

In sintesi

Check Alberta 511 for projected opening times and date for the Icefields Parkway (93N).

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    2–3
    40cm of storm snow over the week has formed a dangerous windslab. Wide crowns up to 2m deep have been seen from Maligne to Parkers area. Strong to extreme SW winds and warm temps will keep this layer very active.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1–3
    Rain to treeline and warm temperatures will produce numerous avalanches of this type. Some of these will step down to ground producing full path releases.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely - Very Likely
    Dimensione
    2–4
    The widespread observations of large and deep avalanches indicates strongly that many of these events are from this instability. Increased loading and warm temperatures will keep this layer active.

Weather Forecast

Snow forecast to taper off, tracking northward from the Icefields through Jasper over the evening. The likely HST total expected to be close to 20cm as the storm breaks. Scattered flurries and moderate to strong gusty SW winds to mark the exit of the snow. Scattered flurries and broken skies fx for Sunday. Cooler expected, high of -12 alpine temps.

Snowpack Summary

+50cm HST this month redistributed with Mod SW winds. Deeply loaded (100+ cm) lee areas with unpredictable spacial variability. Buried localized solar, rain and melt-freeze crusts, up to 2000+m on S and 1600m in the N asp. New snow weakly bridging a faceted older snow pack. Morphing interfaces scattered, at depth through the midpack to ground.

Avalanche Summary

Numerous large natural avalanches (class 3) were observed from the Maligne area to the icefelds at Tree Line and above. These slab avalanches are failing at varied depths; from recent storm snow to deeper older instabilities. Warm temperatures and precipitation will keep the landscape dangerously active.

Confidence

Regioni coperte