Bollettino valanghe

Kananaskis

Mar 31 – Apr 1, 2016Alberta Parks
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Archiviato · scaduto 11 years ago

Pericolo valanghe

Sat
Sun
Alta quota
4 · Forte
Limite del bosco
4 · Forte
Sotto il limite
2 · Moderato
Apri la mappa completa

In sintesi

Solar radiation and a poor overnight freeze will likely contribute to large avalanche on Friday.  If it hasn't slid yet, it may tomorrow resulting in a large avalanche.  If you go out, be out and back early while its still cold and avoid big terrain.

Problemi valanghivi

  • Cornices

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    2–5
    Cornices will likely fail at an increased rate with the influx of heat.  These massive loads are likely to trigger slabs on underlying slopes.

  • Loose Wet

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3
    Loose wet slides are occurring on steeper solar aspects.  A loose wet slide may grow to a size big enough to trigger a slab on the underlying slopes.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    3–6
    The current snowpack structure of dense mid-pack overlying as much as 80cm of weak facets is a recipe for full depth avalanches. Triggering from shallow snowpack areas is a particular concern.  Warm temps also seem to awakening these basal layers.

Confidence

Moderate - Timing or intensity of solar radiation is uncertain on Friday

Weather Forecast

Weather on Thursday night is calling for mainly cloudy and then on friday, the sun is expected to come out...  This means we will only have a minimal freeze likely overnight and strong solar radiation on Friday.  No new snow is forecast and freezing levels will be around 2300m.

Avalanche Summary

A few loose wet slides were observed early in the day.  When the sun came out we had reports of sz 2 and 3 avalanches almost within a few min's of its affect being noticed.  These occurred mainly on solar aspects.

Snowpack Summary

The clouds held the heat in all day and temps at 2200m reached almost +10C.  The upper snowpack is rapidly settling and becomming isothermal in some areas (lower elevations).  The rapid settling is beginning to overload some of the basal interfaces and triggerring what will likely be the climax avalanche cycle of the season.  We should expect paths that have not yet slid to now start to release as large destructive avalanches.  These avalanches are/will likely fail on the weak basal layers down near the ground.  The sun is having a large impact on stability in terms of when it comes out, the solar radiation rapidly decreases the stability and natural avalancehs occur.  If you wanna start really early you may be able to hang onto the crusts for a few hours but start really early....  And be home early also...

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