Bulletin d’avalanche

South Coast

Apr 16 – 17, 2023Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Tue
Wed
Alpin
3 · Marqué
Limite forestière
3 · Marqué
Sous la limite
2 · Modéré

Points saillants

Recent heavy snowfall has left dangerous avalanche conditions across the region. Carefully investigate the bond of storm snow and give it time to strengthen before committing to avalanche terrain.

Problèmes avalancheux

  • Cornices

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

    Recent snowfall and southerly wind have grown cornices and made them more likely to fail.

  • Storm Slabs

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

    Fresh storm slabs are widespread. They should bond relatively quickly once the storm eases, but human-triggering will remain a concern on steep and wind-loaded slopes.

Confidence

Moderate

Avalanche Summary

We suspect natural avalanches occurred during the peak of the storm on Sunday and will remain possible for human triggering on Monday.

Snowpack Summary

Sunday's cold front will have left 30 to 50 cm of new snow, with the deepest amounts expected to be in areas immediately next to the coast. Storm snow will overlie a crust on all terrain except north-facing slopes above 1000 m. The lower snowpack is strong and bonded.

Weather Summary

Sunday night

Cloudy with scattered flurries bringing 10 cm of snow above 500 m, up to 20 cm possible around Sasquatch, 30 km/h south wind, treeline temperatures drop to -5 °C.

Monday

Cloudy with flurries starting mid-afternoon with 5 to 10 cm of snow by the evening, 40 km/h southeast wind, treeline temperatures around -3 °C.

Tuesday

Mostly cloudy with scattered flurries bringing roughly 10 cm of snow above 500 m, 20 km/h south wind, treeline temperatures around -2 °C.

Wednesday

Scattered flurries bring another 10 to 15 cm of snow by midday, then clearing in the afternoon, 30 to 40 km/h southeast wind, treeline temperature climbing to 0 °C.

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Continue to make conservative terrain choices while the storm snow settles and stabilizes.
  • Choose slopes that are well supported and have limited consequence.
  • Be especially cautious as you transition into wind affected terrain.
  • Closely monitor how the new snow is bonding to the crust.
  • Pay attention to cornices and give them a wide berth when traveling on or below ridges.

Régions couvertes