Bollettino valanghe

Kananaskis

Mar 18 – 19, 2013Alberta Parks
Vedi sulla mappa
Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

Periods of intense solar radiation are possible on Tuesday, so watch for the associated rise in avalanche danger on solar aspects. The upper snowpack is complex with several crusts. Carefully evaluate the snowpack before committing to a line.

Problemi valanghivi

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible - Likely
    Dimensione
    1–3
    A buried rain crust is found on all aspects up to 22-2400m.  The bond with this new snow and the underlying crust is variable.  Be sure to dig down and inspect this layer as you travel.  Convex slopes at treeline and gullies are suspect.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–4
    Up to 80cm of recent snow is overlying the Mar 3 temperature crust that is being found on solar aspects well up into the alpine. Field tests are showing the bond of the new snow to this crust as good but warm temperatures may wake up this layer.

  • Storm Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Likely
    Dimensione
    1–5
    Storm slab formation continued today in alpine and open treeline terrain. Slabs up to 40cm thick are found on all aspects due to variable winds. In some cases the slabs sit on a crust layer. These slabs are currently sensitive to human triggering.

Confidence

Fair - Timing or intensity of solar radiation is uncertain

Weather Forecast

Tuesday should bring some sunny weather, but not particularly warm temperatures. Winds are expected to be moderate from the W to NW. Another wave of warm, windy and wet weather is expected late Wednesday.

Avalanche Summary

A more isolated natural avalanche cycle continued today. Both slab and loose avalanches were observed up to size 2.0, and seemed to be confined to the storm snow.

Snowpack Summary

Between 10 and 20cm of new snow fell in the past 24hrs depending on location. Storm snow totals are now near 50cm at treeline. Reverse wind loading yesterday and "traditional" wind loading today have formed touchy storm slabs on all aspects at alpine and treeline elevations. Wind transport at ridgetop was intense at times today and some sluffing was observed in steep alpine terrain. Two separate crusts crusts buried between 50 and 100cm in the snowpack are still causing concern for a step-down avalanche.

Regioni coperte