Avalanche forecast

Jasper

Jan 19 – 20, 2017Parks Canada
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Archived · expired 10 years ago

Avalanche danger

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

Be cautious in the new snow.  Wind and storm slabs may be easily triggered.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–3
    The interface between the new and old slabs could be touchy.

  • Storm Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible - Likely
    Size
    1–2
    Storm slabs may be present  especially at tree-line.  The weight of this may overload the weak facets below.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    2–3
    Concern for new snow overloading the season's weak faceted basal layers.

Weather Forecast

Further 7-10 cm possible until Thursday.  Moderate SW winds continuing, easing on Friday.  Temperatures will gradually fall into the weekend to seasonal levels. 

Snowpack Summary

Recent storm snow (between 10-20 cm) with heavier amounts in the southern forecast area has formed windslab on lee aspects from previous strong to extreme SW alpine winds.  Storm slabs may be present on lower elevation slopes.  These slabs are sitting on buried wind slabs overlying weak facets from the mid-pack to ground.

Avalanche Summary

No avalanche patrol today.  No avalanche observations reported.

Confidence

Due to the number of field observations on Thursday

Regions covered