Bollettino valanghe

Banff Yoho Kootenay

Feb 1 – 2, 2013Parks Canada
Vedi sulla mappa
Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

Warming and solar effect on Saturday may cause local instabilities and increased danger on southerly aspects.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–2
    Isolated wind slabs in steep terrain features may be human triggered or run naturally with slight additional loading.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Possible
    Dimensione
    1–3
    In Kootenay and Yoho there is a buried surface hoar and/or crust layer down about 50 cm. This layer may be triggerable on steep terrain features.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2
    Hard slabs from previous high winds have been buried by recent storm snow. These slabs have been unreactive to skier triggering, but new wind loading may awaken them.

Weather Forecast

Weak precipitation and warm teme\peratures with a westerly flow. Clearing for Saturday may create solar issues with the warm temperatures.

Snowpack Summary

Two main layers in the upper pack are Jan 23 and Jan 4 surface hoar/ facets or suncrust down 25 & 55. Major problem is wind slabs in all open areas easily triggerable in steep terrain.

Avalanche Summary

Very little activity. Some wind slabs in steep terrain to size 2. One older size 2 slab (48 hrs + ) in Kootenay may have failed on surface hoar down 50.

Confidence

Regioni coperte