Avalanche forecast

Jasper

Apr 9 – 10, 2021
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Archived · expired 5 years ago

Avalanche danger

Sun
Mon
Alpine
3 · Considerable
Treeline
2 · Moderate
Below
1 · Low

Highlights

The Icefields region remains winter conditions. Good travel and ski conditions are found in sheltered locations.

Avalanche problems

  • Wind Slabs

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

    There is a lot of snow available for wind transport. Investigate whether this condition rests on a slippery temperature crust having a higher potential for human triggering.

  • Deep Persistent Slabs

    • Alpine
    • Treeline
    • Below treeline
    Likelihood
    Unlikely - Possible
    Size
    2–3.5

    Forecasters are noting a slight increase in activity in the past few days. One could say the probability is increasing with either natural or human triggering. Shallow snowpack areas would have the increased potential for human triggering.

Weather Forecast

Saturday will bring sun, cloud, flurries, -10C, light gusting moderate NW winds, and valley bottom freezing level. Sunday will be similar, 4cm of snow, -13C, and light NW winds.

Snowpack Summary

25cm of new snow arrived Wednesday night at Parkers ridge with much less further North and South. Winds are increasing to moderate speeds forming alpine ridgetop windslabs. The midpack is firm snow over weak basal facets and depth hoar near the ground.

Avalanche Summary

Friday's explosive control work on Parkers slabs produced two size 2.5 hard windslabs burying the road 2m deep. One natural size 2.5 noted on a North aspect in the alpine scrubbing down to rocks. Thursday's Icefield's patrol noted noted one size 3 running full path recently occurring on Churchill slide path.

Confidence

Forecast snowfall amounts are uncertain on Saturday

Regions covered