Bollettino valanghe

Jasper

Nov 30 – Dec 1, 2018Parks Canada
Vedi sulla mappa
Archiviato · scaduto 8 years ago

Pericolo valanghe

Sat
Sun
Alta quota
2 · Moderato
Limite del bosco
1 · Debole
Sotto il limite
Senza grado
Apri la mappa completa

In sintesi

Strong winds have raked the Alpine, with hard wind affected snow the norm.  Pockets of softer snow are available near Treeline.  Hazard will decrease daily with a dry, cooling trend.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2
    Strong to extreme winds early-mid week have left widely scoured surfaces with pockets of hard windslab.  These are suspected to be stubborn to unreactive to human triggering, but if triggered may propagate wider than expected.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1.5–2.5
    Although it seems currently dormant, it would be wise to assess the strength of the interfaces above & below the October 25 crust before entering committing lines.  This layer exists in most skiable slopes.  See forecast details for more info.

Weather Forecast

Friday: Valley fog clearing. Calm winds.  Treeline High -8, no precipitation.Saturday: Cloudy.  Light NE winds. Treeline high -9, flurries (trace amounts).On Sunday, a brief NE upslope further ramps up cloud cover and drags down temps, but promises little snowfall.Click here for the Avalanche Canada mountain weather forecast.

Snowpack Summary

Previous Strong SW winds left the Alpine heavily wind affected. The October 25 crust, found towards the bottom of the snowpack, has not produced recent avalanches in the region. This crust is predominantly in deep snowpack areas, such as N & E facing lee features. Facets and Depth Hoar below this layer have given broken results in snowpack tests.

Avalanche Summary

A road patrol of the Icefields Parkway in good visibility revealed only one avalanche, a Large (size 2) natural in the Alpine (2400m) on a N aspect.  This was likely a wind slab, possibly cornice triggered, occurring during strong winds on Wednesday.

Confidence

Due to the number of field observations

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