Avalanche forecast

Banff Yoho Kootenay

Apr 12 – 13, 2013Parks Canada
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Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low
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Highlights

Snow and strong wind expected tonight and tomorrow morning.  Temperatures will remain cold for the weekend - the return to winter continues...(LP)

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–2
    Watch for isolated soft slabs in the lee of alpine features.  These were obvious to see and avoid today, but will be blanketed by new snow tonight.  Moderate to strong southerly wind tonight and north wind tomorrow add to the current slab condition.

  • Loose Dry

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–2
    Loose snow avalanches involving the storm snow running underlying crusts can be expected to accompany snowfall and increase in winds forecasted for tonight and tomorrow.  This is a definite concern for skiers and climbers in gully/couloir features.

Weather Forecast

We expect some snow tonight and tomorrow morning (~10-15 cm) with strong Southerly wind.  Winds will switch to moderate to strong Northerly winds as the system passes tomorrow.  Expect convective flurries for the remainder of the weekend and freezing levels will remain low.

Snowpack Summary

There was 10-15 cm overnight. There is some wind effect in the alpine that has created isolated soft slabs in immediate lee terrain. These slabs overlay 10-30 cm of previous storm snow, which rests on suncrusts on solar aspects and facetted snow on polar aspects.

Avalanche Summary

No avalanches observed or reported. 

Confidence

Intensity of incoming weather systems is uncertain

Regions covered