Avalanche forecast

Banff Yoho Kootenay

Apr 13 – 14, 2012Parks Canada
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Archived · expired 14 years ago

Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
2 · Moderate

Highlights

Thursdays rain event changed the snowpack below 2500m, and resulted in an avalanche cycle at treeline and below. One more day of possible light drizzle Sat. with little freeze. Regular spring conditions should prevail starting Sunday. SH

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–3
    Up to 20cm of new snow will be reactive where it sits over sun crusts, as well as temperature crusts on shady asp. from high freezing levels earlier in the week. Caution is advised until the bond improves. Light snow Sat. at higher elevations.
  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    Forecasts call for light rain tomorrow at treeline and below, and wet slides will be still possible if this comes to fruition.
  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–3
    Some slides occurred in the last 24 hours to 2.5 which gouged down to the basal facets during the rain. Activity will slow down as temperatures cool. Thin, steep areas and large loads such as cornice failure could possibly trigger deep weaknesses.

Weather Forecast

Snowpack Summary

Avalanche Summary

Confidence

Freezing levels are uncertain on Saturday

Regions covered