Bulletin d’avalanche

Kitimat

Apr 22 – 23, 2023Avalanche Canada
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Archivé · expiré 3 years ago

Danger d’avalanche

Mon
Tue
Alpin
3 · Marqué
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Points saillants

Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.

Concern for triggering large persistent slab avalanches remains. Avoid steep, rocky, and wind affected areas where triggering slabs is more likely.

Problèmes avalancheux

  • Wind Slabs

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

    New snow and strong southerly wind may have formed wind slabs on lee aspects at treeline and above.

  • Persistent Slabs

    • Alpin
    • Limite forestière
    • Sous la limite forestière
    Probabilité
    Possible
    Taille
    1.5–3

    A weak layer buried in late March is down 40-60 cm and exists as surface hoar and facets on north-facing slopes and a crust elsewhere.

    We currently have very limited snowpack observations from this region to aid in determining the likelihood of triggering avalanches on the layer.

Confidence

Low

Avalanche Summary

No avalanches were reported on Friday. However, observations in this region are currently very limited.

A few naturally triggered size 2 wind slab avalanches were reported on steep, northerly aspects in the alpine on Thursday.

Most professional operations are now closed which means we have very little snowpack or avalanche observation data. Please consider sharing any information or photos you have on the Mountain Information Network to help guide our forecasts.

Snowpack Summary

New snow and strong southerly wind may have formed wind slabs on lee aspects at treeline and above.

A crust exists up to ridgetop on south-facing slopes and on all aspects up to approximately 1300 m.

A weak layer buried in late March is down 40-60 cm and exists as surface hoar and facets on north-facing slopes and a crust elsewhere.

The mid and lower snowpack is considered generally strong and well-bonded.

Weather Summary

Saturday Night

Cloudy with flurries; 3-20 cm (rain below 900 m) / 40 km/h south ridgetop wind / Temperature at treeline around -2 C / Freezing level 1000 m

Sunday

Cloudy with isolated flurries; 0-10 cm (rain below 1000 m) / 40 km/h south ridgetop wind / Temperature at treeline around -1 C / Freezing level 1200 m

Monday

Cloudy with isolated flurries; 3-5 cm / 50 km/h southwest ridgetop wind / Temperature at treeline around -2 C / Freezing level 1100 m

Tuesday

Cloudy with isolated flurries; 0-3 cm / 40 km/h southwest ridgetop wind / Temperature at treeline around -3 C / Freezing level 1000 m

More details can be found in the Mountain Weather Forecast.

Terrain and Travel Advice

  • Watch for newly formed and reactive wind slabs as you transition into wind affected terrain.
  • If triggered, wind slabs avalanches may step down to deeper layers resulting in larger avalanches.
  • Avoid steep, rocky, and wind effected areas where triggering slabs is more likely.
  • Watch for signs of instability like whumpfing, hollow sounds, shooting cracks or recent avalanches.

Régions couvertes