Avalanche forecast

Jasper

Feb 25 – 26, 2021
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Avalanche danger

Fri
Sat
Alpine
3 · Considerable
Treeline
3 · Considerable
Below
2 · Moderate
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Highlights

Another pulse of precipitation and wind will keep the hazard elevated for a few days. Watch for wind effected terrain. Dig down to assess the bond of the new/old snow interface.

Avalanche problems

  • Wind Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Possible
    Size
    1–2.5

    Contuined Moderate to Strong SW winds are creating wind slabs

  • Loose Dry

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

    Loose dry in steep terrain remain a hazard for ice climbers. Small sluffs could have big consequences in the wrong terrain.

  • Deep Persistent Slabs

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

    Caution in thin snowpack areas where triggering is more likely. This is a low probability but high consequence problem.

Weather Forecast

An additional 10cm of snow is forecasted in the Parkers ridge area over the next 36 hours. This will yet again be accompanied with Moderate to Strong South Westerly winds. Temperatures will be -8 and cooling off to -20 for the weekend

Snowpack Summary

Mod to Strong ridge top winds from the SW have created wind slabs or hard surface conditions in Alp & TL. Wind slabs overlie facets which will bond poorly. In sheltered areas the top 30-60cm is faceted snow over a supportive mid-pack where the snowpack is deeper. Thin snowpack areas are weak, un-supportive, and facetted.

Avalanche Summary

Forecasters down south on 93N noted wide spread wind effect in all alpine and exposed tree line features with strong to extreme snow transport at ridge tops today. Small loose dry observed with the suns help at the heat of the day on South West-West aspects.

Confidence

Regions covered