Bulletin d’avalanche

Banff Yoho Kootenay

Feb 21 – 22, 2015Parks Canada
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Archivé · expiré 12 years ago

Danger d’avalanche

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

The hazard is now moderate but remember that moderate is not 'good to go'. Sensible terrain choices are required irrespective of hazard ratings. The snowpack structure at the base is still lousy and confidence in its overall strength is suspect.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2
    Be cautious near ridge-crests and in lee areas.

  • Deep Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    2–3
    The base of the snowpack is weak due to the presence of basal depth hoar and facets. Natural activity has ceased but skier triggering is still possible on this layer especially in shallow areas and places where the snowpack is unevenly distributed.

Weather Forecast

A weak disturbance passage today will give rise to another upper ridge of high pressure that will build in for the remainder of the week.  Cold air will move in briefly on Saturday but will not linger for too long.  Freezing levels will rise to 2100 meters for Monday. Little precipitation is forecast anytime this week.

Snowpack Summary

The upper and mid sections of the snowpack continues to settle out and with exception of the Little Yoho, much of the rest of the Rockies snowpack still has the basal facet and depth hoar weaknesses component intact. Temperature crust present below 2000 meters northerly aspects and solar crusts are present to higher elevations and steeper slopes.

Avalanche Summary

No new avalanches were observed or reported today.

Confidence

Due to the number of field observations on Saturday

Régions couvertes