Avalanche forecast

Kootenay Boundary

Nov 28 – 29, 2012Avalanche Canada
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Archived · expired 14 years ago

Avalanche danger

Fri
Sat
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
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Highlights

This bulletin is based on a very limited data, and significant variations in conditions exist.

Avalanche problems

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–5
    Although reactivity has been limited, persistent layers represent a low probability-high consequence scenario. Persistent slabs may "wake-up" with additional loading.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Very Likely
    Size
    1–4
    Forecast weather will create reactive storm/ windslabs. Watch for triggering below ridgecrests, in gullies and behind terrain features

Weather Forecast

Light snowfall is expected to start Wednesday evening and intensify throughout the rest of the forecast period.Ridgetop winds are forecast to be moderate to strong from the southwest on Thursday trending to strong and southwesterly on Friday and Saturday.Freezing levels should stay at about 1450m for the entire period.

Avalanche Summary

No new avalanches have been reported. If you and your friends have been out exploring and riding in the backcountry, and have some observations to share please send an email to [email protected].

Confidence

Fair - Timing, track, or intensity of incoming weather is uncertain

Snowpack Summary

Healthy amounts of snow fell throughout the last week; however, the more recent break in the weather has given the upper snowpack a chance to settle and gain strength. Over the last few days, surface hoar may have formed and will be something to watch as the next system moves in to the region on Thursday.In the mid snowpack there may be a spotty, thin buried surface hoar layer between 50 and 80cm down. At the base of the snowpack sits the early November rain crust. Located about 100cm below the surface, it seems most likely to be found in deeper snowpack areas and may have associated facets. These layers seem to have been unreactive in recent days, but may have the potential to 'wake-up' with forecast loading.

Regions covered