Avalanche forecast

Banff Yoho Kootenay

Apr 14 – 15, 2012Parks Canada
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Avalanche danger

Mon
Tue
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low
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Highlights

A good freeze is forecast for most areas Sunday morning. We should see sunny breaks, light Northerly winds, and slight afternoon convection with trace amounts of snow. Local hazard depends on how much of a crust forms overnight. SH

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–3
    Wind slabs up to 30cm thick sit on sun crusts on solar asp. or temperature crusts on shady asp. These wind slabs were less reactive today as the bond to the sliding surface improves, but be cautious of steep unsupported terrain near ridge crests.

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    The sun will poke out tomorrow in some areas, and with it will come afternoon rising hazard on solar aspects. The rate of this will depend on the overnight freeze and amount of solar input locally.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–3
    Activity on the deep, basal depth hoar has tapered off, and we haven't seen a slide occurring on the Valentines surface hoar in quite some time. These layers could be awoken from thin spots, or from a large trigger such as a cornice failure.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

on Sunday

Regions covered