Bollettino valanghe

Banff Yoho Kootenay

Nov 16 – 17, 2012Parks Canada
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Archiviato · scaduto 14 years ago

Pericolo valanghe

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

In sintesi

A warm and windy storm may blow through on the weekend, but expect little change in the danger levels until it arrives Saturday afternoon.

Problemi valanghivi

  • Wind Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    1–2
    Various hard and soft wind slabs (20-50cm thick) in the alpine are sitting on the Nov 6 crust and producing moderate/hard shears in compression tests. Slabs are stubborn but still possible for a skier to trigger these in steep lee terrain.

  • Persistent Slabs

    • Alta quota
    • Limite del bosco
    • Sotto il limite del bosco
    Probabilità
    Unlikely - Possible
    Dimensione
    2–3
    Deep slabs size 2-3 have been noted on isolated steep alpine slopes over the past week. Failure plane was at the bottom of the snow pack on firn or glacier ice.�No new have been reported these last few days but are still possible in the high alpine.

Weather Forecast

Little change in the weather on Friday, but expect ridge-top winds to pick up to strong/extreme from the W/SW on Saturday, with freezing levels spiking to 1800m and 5-10cm Saturday night.

Snowpack Summary

A field trip to the Bow Summit area today found an average snowpack of 55-65cm. Generally, 20-25cm of variable soft slabs with pockets of unconsolidated snow overlay the laminated November rain crust, which supported skis but not a person on foot.

Avalanche Summary

No new activity seen in the last 48 hours. Expect a natural cycle to develop on Saturday, especially later in the day, when warm temperatures, strong winds, and new snow combine to create windslabs.

Confidence

Forecast snowfall amounts are uncertain

Regioni coperte