Bulletin d’avalanche

Banff Yoho Kootenay

Feb 28 – Mar 1, 2018Parks Canada
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Archivé · expiré 9 years ago

Danger d’avalanche

Thu
Fri
Alpin
2 · Modéré
Limite forestière
1 · Faible
Sous la limite
1 · Faible
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Points saillants

In general the snowpack is strong and we have seen the mid snowpack weak layers gain significant strength over the past two weeks. RIght now the main issue is windslabs in leeward pockets from the past 48 hours - they are small but could catch you.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Fresh wind slabs exist in lee areas in the alpine. While they may not be very thick or particularly touchy, they certainly have the potential to carry you into an undesirable location (cliffs/terrain traps) if triggered in steep terrain.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely
    Taille
    2–3
    We continue to track three mid-snowpack weak layers from earlier this winter. They are bonding well and test results no longer show failures here. This problem continues to be in the back of our minds, but our confidence in the snowpack has improved.

Confidence

Weather Forecast

Minor warming trend over the next few days, with highs reaching -2 by Thursday.  Otherwise expect light flurries with no significant accumulations over the next few days.  Overnight Tuesday will continue to be windy, with winds shifting to the southwest and slowing down on Wednesday.

Snowpack Summary

5 cm of loose snow on the surface at treeline with wind slabs forming in open areas at higher elevations. Three mid-pack weak layers of surface hoar and/or facets appear well bonded, but are worth keeping in mind on bigger slopes. Snowpack tests are showing no results on those layers.

Avalanche Summary

Windslabs us to size 1.5 from explosives control at Sunshine Village.  Otherwise no new avalanches reported.

Régions couvertes