Bulletin d’avalanche

Waterton Lakes

Avalanche Canada
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Danger d’avalanche

Sun
Mon
Alpin
3 · Marqué
Limite forestière
2 · Modéré
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

[10:00 am Update] Cooler temperatures have arrived sooner than expected and light snow is falling in the Waterton Townsite. The warm temps and rain have however decimated the snowpack. Adequate snow coverage below treeline only remains in the SW corner of the park. There is still snow in the alpine and at treeline.

Problèmes avalancheux

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    2–3

    With several days of rain and warm avalanches are failing deeper in the snowpack and then transitioning to loose wet. Anticipate this problem will become less likely as the temperature cools on Sunday.

  • Loose Wet

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Likely
    Taille
    1–2

    There has been significant amounts of rain in the last days and slab avalanches are transitioning to wet loose down the runouts. This problem with become less sensitive with the cooler temps through the weekend.

Confidence

Avalanche Summary

Several new piles of wet loose debris to size 2.5 observed on a road patrol up Akamina Parkway. Uncertain of the failure plane.

Snowpack Summary

A few new cm's of snow sits on a rain soaked snowpack at all elevation. Free running waterfalls could be seen in alpine features up the Akamina Parkway on Friday. The snow that remains is beginning to refreeze into crust as temperatures cool.

Weather Summary

Saturday

Rain has transitioned to snow 5-10cm today. Alpine high of -1°C. Wind 30-40km/h. Freezing level lowering to valley bottom.

Sunday

Clearing skies with an alpine high of 0 °C and low of -3°C. Wind SW at 30-40km/h and a freezing level falling to valley bottom.

Monday

Clear skies and an alpine high of -3 °C. Winds SW 20km/h.

Current weather forecast: Mountain Weather Forecast

Weather tables available here

Terrain and Travel Advice

  • A moist or wet snow surface, pinwheeling, and natural avalanches are all indicators of a weakening snowpack.
  • Wet avalanche activity may step down to deeply buried persistent weak layers at lower elevations.

Régions couvertes