Bulletin d’avalanche

Waterton Lakes

Avalanche Canada
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Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré
Périmé — ce bulletin a expiré 5 months ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Triggering wind slabs remains the primary concern. Use caution in wind loaded features as rider triggered wind slabs are likely.

Pay close attention to reverse loading over the weekend.

Problèmes avalancheux

  • Wind Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1.5–2.5

    Old wind slabs can be found in standard lee features. New wind slabs are expected to form from light to moderate northeasterly winds. Watch out for reverse loading.

Confidence

Moderate

  • We are uncertain about alpine conditions due to limited field observations.

Avalanche Summary

Several wind slab avalanches were observed in the last 48 hours. These avalanches were from alpine and treeline start zones and up to size 2.5.

Snowpack Summary

Up to 65cm of new snow is being redistributed into wind slabs in lee features. This sits over variable surfaces including widespread wind affected snow and a new 3-8cm thick crust treeline and below treeline. Beneath this, 30–50 cm of settled snow overlies multiple crusts. The lower snowpack is generally well settled.

Weather Summary

Saturday

Isolated flurries. Alpine high of -9 °C. Wind gusting to 30 km/h. Freezing level at valley bottom.

Sunday

Isolated flurries. Alpine low of -17 °C and high of -9 °C. Wind gusting to 40 km/h. Freezing level at valley bottom.

Monday

Scattered flurries. Up to 5 cm. Alpine low of -9 °C and high of 2 °C. Wind gusting to 70 km/h. Freezing level at 2800m.

Current weather forecast: Mountain Weather Forecast

Terrain and Travel Advice

  • Recent wind has varied in direction, so watch for wind slabs on all aspects.
  • Recent strong wind means wind slabs may be found farther downslope than expected.

Régions couvertes