Bollettino valanghe

Kananaskis

Feb 27 – 28, 2017Alberta Parks
Vedi sulla mappa
Archiviato · scaduto 10 years ago

Pericolo valanghe

Tue
Wed
Alta quota
2 · Moderato
Limite del bosco
2 · Moderato
Sotto il limite
1 · Debole
Apri la mappa completa

In sintesi

Despite the MODERATE hazard rating, forecasters are being very conservative due to the snowpack structure. While it may be only "possible" to trigger, any avalanche will likely step down to the weak basal layers and be very large and destructive.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    2–3
    Recent winds have created isolated thin wind slabs in lee and cross loaded areas at Treeline and above.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3
    The buried hard slab is the concern here. Probing with a ski pole is the best way to monitor its location. Expect wide propagations if it does get triggered.

  • Deep Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–4
    This layer will be with us for the year and should be put into every slope decision. The current snowpack structure is very concerning, with the possibility of very large avalanches if a trigger point is found.

Confidence

High -

Weather Forecast

Tuesday will be cloudy with sunny periods and isolated flurries. Alpine temperatures are only expected to reach a high of -17 °C, which along with moderate westerly winds will contribute to significant wind chill values. Wednesday will remain cool with some light flurries.

Avalanche Summary

Two size 2.0 naturally triggered slabs occurred on Little Tent Ridge in the last 24 to 48hrs. These were both size 2.0 avalanches initiating near 2400m on a steep East aspect. Depths ranged from 40 to 60cm, with up to 80m wide propagations and ran for approximately 500m.

Snowpack Summary

1cm of new snow overnight. Fresh thin wind slabs have formed at Treeline and above. A test profile in the Ten Bowl area today revealed a 165cm deep snowpit with the entire bottom 100cm consisting of very weak facets and depth hoar. Moderate compression test results were found down 25 to 30cm. Moderate to hard test results occurred down 60 to 70cm within the facets, indicating the possibility for an avalanche to step down to the weak basal layers. The current snowpack structure is very concerning, and despite the recent lack of natural avalanches human triggering of a very large avalanche is possible.

Regioni coperte