Avalanche forecast

Jasper

Apr 13 – 14, 2015Parks Canada
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Archived · expired 11 years ago

Avalanche danger

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

Still winter here as more snow expected tomorrow morning. Strong winds have developed windslab conditions on lee aspects in the alpine. Monitor the incoming storm input for additional load. 

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    Wind slabs have formed on lee slopes and cross loaded features at alpine and exposed tree line elevations.

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2
    Cornice are large and ominous. Give them a wide berth whenever possible. Current winds will continue to build their mass.

Weather Forecast

A pulse of snow is expected Tuesday am but models are not agreeing to the precise amount. Could be 5-15cm depending on local influences. Winds will be light from NW. Freezing levels will be 1800m on Tuesday then a good freeze Tuesday night followed by cool temperatures on Wednesday. 

Snowpack Summary

15cm to 20cm of recent storm snow has been whipped up by moderate winds into a windslab condition. This rests on a supportive temperature crust which exists up to 2500m. Weak basal facets are bridged by a strong mid-pack in most areas at treeline and above.

Avalanche Summary

Three cornice failures were noted today. One initiated a size 2 slab on Parkers ridge. 

Confidence

Intensity of incoming weather systems is uncertain on Tuesday

Regions covered