Bulletin d’avalanche

Waterton Lakes

Feb 14 – 17, 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

Ski conditions are a mix of breakable and not-so-breakable crusts.  Cross your fingers for some some (much-needed) new snow tonight; if we see 5cm or more, expect small Storm Slabs to bump the Treeline Danger up to Moderate.

Problèmes avalancheux

  • Storm Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1–2
    These are currently thin and isolated, but will increase if we see the new snow Saturday and Sunday nights, that some forecasts predict.  The wind will blow any new snow onto lee slopes near ridge crests -use increased caution in these areas.

Weather Forecast

Forecasts models conflict, but show up to 8 cm of new snow Saturday night, accompanied by moderate to strong SW winds. A clearing trend on Sunday, before - possibly - another 5cm early on Monday. Temperatures will remain in the 0 to -7 range. By Tuesday, winds increase, cloud cover thickens, and we could see significant snowfall.

Snowpack Summary

Ongoing warm temperatures are causing continued settlement of our aging snowpack. A breakable 5cm crust exists Below Treeline, and on slopes facing the sun. At Alpine/Treeline elevations, Cornices and new Wind Slabs are developing lee to strong SW winds. Buried up to 1m is a persistent, faceting rain crust, which has not been active recently.

Avalanche Summary

A size 1.5 natural avalanche was observed in North facing alpine terrain on Saturday; likely a cornice fall, triggering a small Wind Slab below. Several loose wet avalanches, up to Size 1.5, occurred during Fridays' minor rain event.

Confidence

Forecast snowfall amounts are uncertain

Régions couvertes