Bollettino valanghe

Kananaskis

Mar 11 – 12, 2025Avalanche Canada
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Archiviato · scaduto 2 years ago

Pericolo valanghe

Thu
Fri
Alta quota
4 · Forte
Limite del bosco
3 · Marcato
Sotto il limite
3 · Marcato

In sintesi

"Avalanche control planned on Wednesday at 1pm on the Canmore Hill(EEOR/Mt. Rundle)"

We still have a complex snowpack. Be conservative with route selection.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1.5–2.5

    If triggered, these are likely to step down to the persistent slab and then to the basal facets.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1.5–3

    This sits upon weak faceted crystals, sun crust or a dense layer that are perfect for slab avalanches. This layer will not react well to new loading, or even re-loading from wind.

  • Loose Dry

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Very Likely
    Dimensione
    1–2

    Concern for steep extreme terrain

Confidence

Moderate

Avalanche Summary

Several loose dry avalanches to size 1 were observed. Natural activity seem to have slowed down a bit.

Snowpack Summary

The field team encountered around 45cm of settled snow from the recent storm overlying sun crust or the Jan 30th interface with the persistent slab. The field team also reported extensive whomphing and cracking where they travelled and were very conservative in their route selection and exposure to avalanche terrain. The issue right now is that we have the persistent slab sitting on weak facets and could be easily triggered. Then we have the recent wind slab that is resting on the persistent slab for even more additional load. In a nutshell, it would not take much to trigger the wind slab and then in turn trigger the persistent slab for a fairly large avalanche. It will take some time for this to heal.

Traveling off of established skin tracks at lower elevations is very challenging due to the weak nature of the snowpack.

Weather Summary

Wednesday:

A mix of sun, cloud, and isolated flurries. Day time high of -3c with moderate South winds.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Choose simple, low-angle terrain without steep convex rolls.
  • Avoid exposure to overhead avalanche terrain; avalanches may run surprisingly far.
  • Cautiously approach steep slopes that are open or sparsely treed.
  • Fresh snow rests on a problematic persistent slab, don't let good riding lure you into complacency.
  • Avoid steep, rocky, and wind-affected areas where triggering slabs is more likely.
  • Avoid shallow, rocky areas where the snowpack transitions from thick to thin.

Regioni coperte