Avalanche forecast

Jasper

Apr 5 – 6, 2022
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Avalanche danger

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

Strong winds have created fresh wind slabs in the alpine. On Wednesday watch out if the sun comes out -  wet loose avalanche down low and cornices up high could wake up.

Avalanche problems

  • Wind Slabs

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

    Strong SW winds created fresh wind slabs. These new wind slabs sit over a variety of firm surfaces including wind effected snow and sun/temperature crusts.

  • Cornices

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    1–3.5

    Fresh cornices might become reactive with strong solar input

  • Loose Wet

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–1.5

    Main concern during the heat of the day and solar input.

Avalanche Summary

A few small, size 1 wind slabs have been observed in higher elevation leeward features.

Confidence

Timing or intensity of solar radiation is uncertain on Tuesday

Snowpack Summary

Strong SW winds are redistributing the recent snow into lee features in the alpine and down into treeline. The freezing level is around 2200m. There is a sun crust high into the alpine on solar aspects and and melt freeze crust up to 2200m. There is a well settled mid-pack.

Weather Forecast

Wednesday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: High -8 C.

Ridge wind west: 10-25 km/h.

Freezing level: 1400 metres.

Thursday

A mix of sun and cloud.

Precipitation: Nil.

Alpine temperature: Low -8 C, High -3 C.

Ridge wind southwest: 15 km/h.

Freezing level: 2000 metres.

Regions covered