Lawinenlagebericht

Banff Yoho Kootenay

Nov 16 – 17, 2012Parks Canada
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Archiviert · abgelaufen 14 years ago

Lawinengefahr

Fri
Sat
Hochgebirge
1 · Gering
Waldgrenze
1 · Gering
Unterhalb
Keine Stufe
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Kernpunkte

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

Lawinenprobleme

  • Wind Slabs

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    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

    • Hochgebirge
    • Waldgrenze
    • Unterhalb der Waldgrenze
    Wahrscheinlichkeit
    Unlikely - Possible
    Größe
    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

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