Bulletin d’avalanche

Waterton Lakes

Mar 3 – 6, 2020Parks Canada
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Archivé · expiré 7 years ago

Danger d’avalanche

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

A rapid drop in temperature has settled the upper snowpack but pockets of reactive windslab still exist in alpine start zones. Hazard will be higher than forecast if snowfall amounts are more than 15cm on Wednesday.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Unlikely - Possible
    Taille
    1–2

    Watch out for heavily loaded pockets near ridgetops or in cross loaded features.

Weather Forecast

Tuesday: Mainly cloudy with scattered flurries. 5 mm precipitation. West wind 50km/h gusting 80. Freezing level 1500m.

Wednesday: Flurries. 5-10cm snow. Strong West wind with extreme gusts. Freezing level valley bottom.

Thursday: A mix of sun and cloud. No precipitation. Strong SW wind. Freezing level valley bottom.

Snowpack Summary

Waterton received 15cm of snow Sunday with strong-extreme SW wind. This has added to a surface windslab which sits over a variety of surfaces including suncrust, old windslab & the Feb.1 melt freeze crust. Recent rapid cooling has settled the upper snowpack significantly. The midpack is strong, though weaker basal facets still lurk in thin areas.

Avalanche Summary

No new observations.

Significant cornice growth at Cameron Lake.

Confidence

Forecast snowfall amounts are uncertain on Wednesday

Régions couvertes