Avalanche forecast

South Columbia

Nov 29, 2016Avalanche Canada
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Archived · expired 10 years ago

Avalanche danger

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

Recently formed storm slabs may still be reactive to human triggers. Use additional caution in shallow, rocky, or wind affected alpine terrain.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    Recently formed wind slabs may remain reactive to human triggers for several days.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2–3
    Storm slabs may remain touchy even though the storms have passed, especially at higher elevations and on wind-loaded features.

Avalanche Summary

No new avalanches were reported in this region on Sunday. However, a natural size 3 and several size 2 avalanches were reported on the east side of Rogers Pass in the highway corridor.

Confidence

Low - Due to the number of field observations

Weather Forecast

Tuesday: Mix of sun and cloud / light southerly winds / Freezing level around 900m. Wednesday: Possible flurries / Light westerly winds / Freezing level around 1200m. Thursday: Mix of sun and cloud / Light northwesterly winds / Freezing level around 900m.

Snowpack Summary

30-70 cm of recent snow formed storm and wind slabs that were reactive to human triggers over the weekend. These slabs will likely become less reactive in the coming days but will still require careful slope by slope evaluation. Reports suggest the the mid-November crust down 60-120 cm is well bonded to the overlying snow. Below the crust the snowpack is generally well settled. Limited observations suggest snowpack depths vary greatly throughout the region and are on average 100-180 cm at treeline elevations with generally less snow in the southern portion of the region.

Regions covered