Avalanche forecast

Jasper

Jan 6 – 7, 2022
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Archived · expired 5 years ago

Avalanche danger

Fri
Sat
Alpine
2 · Moderate
Treeline
2 · Moderate
Below
1 · Low

Highlights

Pay attention to snowfall amounts and increasing winds throughout the day on Thursday. These inputs can increase avalanche danger. 

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2

    Variable wind directions have caused reverse loading. Expect lingering wind slabs due to the cold temperatures. Careful assessment is required with local terrain influences.

  • Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1.5–3

    This layer is a rain crust up to 1950m and reactive to large loads. Typically this layer is down around 40cm.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely
    Size
    1.5–3

    Natural deep avalanches are getting less frequent yet it remains a low probability and high consequence event if you push your luck.

Weather Forecast

Thursday

Cloudy with scattered flurries.

Accumulation: 5 cm.

Alpine temperature: High -11 °C.

Ridge wind southwest: 10-20 km/h.

Freezing level at valley bottom.

Friday

Cloudy with scattered flurries.

Accumulation: 5 cm.

Alpine temperature: Low -19 °C, High -7 °C.

Ridge wind southwest: 15-35 km/h.

Freezing level at valley bottom.

Snowpack Summary

Cold temperatures continue to promote faceting. Expect lingering wind slabs in deposition zones. The mid-pack is supportive with the Dec 1st interface down 40cm as a rain crust below 1950m. Basal faceting continues near or on the ground.

Avalanche Summary

One large avalanche was reported by the public over an ice climb on Mt. Wilson. See the MIN report.

Confidence

Forecast snowfall amounts are uncertain on Friday

Regions covered