Bulletin d’avalanche

Summit Lake

Chugach National Forest Avalanche Center
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Danger d’avalanche

Wed
Alpin
2 · Modéré
Limite forestière
2 · Modéré
Sous la limite
1 · Faible
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Périmé — ce bulletin a expiré 2 years ago. Vous consultez des conditions passées, pas le bulletin en cours.

Points saillants

Triggering a slab avalanche on slopes with old wind loaded snow is the main concern for the Summit Lake forecast area. These slabs are likely to be 1-2' thick and found where last week's winds drifted snow into steep bowls and gullies. Additionally, glide cracks releasing into avalanches remain a concern. Continuing to look for and avoid spending any time under these dark cracks is recommended.

 

Problèmes avalancheux

  • Persistent Slabs

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

    It has been 10 days since the last snowfall in the Summit Lake area. Although Girdwood picked up a couple of new inches yesterday, everywhere south of Girdwood was high and dry. With possibly another week of dry weather and snow surface conditions less than ideal in many areas (a mix of highly wind affected snow, some pockets of soft snow, and hard scoured ridges) this is a great time to practice your avalanche rescue skills, which is exactly what we did yesterday! 

    Although it has been several days since the last wind hit Summit Lake, there is still a chance a person could trigger a slab avalanche on a steep wind loaded slope. This is because there is weak snow under these old wind slabs. Some of these old slabs span entire bowls, which would make a scary avalanche if it released. Something to consider. Watch for steep terrain with stiff snow on the surface and warning signs like shooting cracks or collapsing/whumpfing as clear indications of unstable snow.

    *Safer ski/riding options and the best surface conditions will be in sheltered areas with soft snow on the surface. 

  • Glide Cracks

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

    We have not heard of any new glide avalanches in this region for several days, yet the cracks are still on the move and opening up. Just because there might be a lull in avalanches doesn't mean we can get complacent. Always be wary of glide cracks and limit, as best you can, time under them. As we've been saying, these are unpredictable in nature, highly destructive, and can release at any time.

Régions couvertes