Bulletin d’avalanche

Waterton Lakes

Mar 6 – 9, 2016Parks Canada
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Archivé · expiré 11 years ago

Danger d’avalanche

Sun
Mon
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Another warm storm arrives early Sunday. Expect good skiing at upper elevations, with heightened avalanche conditions on specific terrain features: Keep an eye peeled for Storm Slabs, and don't linger below cornices.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    Expect new snowfall, warm temperatures and wind to build new storm slabs on Sunday / Sunday night. These may be large on isolated lee slopes.  They will become less sensitive to triggering later in the forecast period.

Weather Forecast

Two fast moving fronts - warm followed by cold- should bring us 10cm or more snow at upper elevations on Sunday, with strong West winds. Below Treeline, rain should turn to wet snow showers by late Sunday as freezing levels drop. Monday-Tuesday, a ridge brings a mix of sun and cloud, moderate Westerly winds, and freezing levels at valley bottom.

Snowpack Summary

A foot of new snow that fell during the past week has settled nicely with warm temperatures, and is well bonded to the old snow. A new surface crust exists on all slopes facing the sun. In the alpine, surfaces are hard and windblown; while on more sheltered slopes near treeline, some settled Wind Slabs exist. Snow on Sunday will create new slabs.

Avalanche Summary

Extensive observations on Friday revealed only one small avalanche from extreme terrain, on Forum Peak. Large Glide cracks still exist on the South aspects of Mt Carthew.

Confidence

Intensity of incoming weather systems is uncertain on Sunday

Régions couvertes