Bulletin d’avalanche

Jasper

Apr 9 – 10, 2021
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Archivé · expiré 5 years ago

Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible

Points saillants

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

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    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

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    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

Régions couvertes