Avalanche - orientation NE Avalanche Blackwood Canyon (USA), secteur Polaris Point, Near Stanford Rocks

01 marzo 2012 13:30

skiers skinned up towards Stanford Rocks. When they reached this area where
they wanted to ski, they dropped a small piece of cornice onto the slope as a
test. This cornice drop released a slab a few inches deep that propagated
widely across the slope.  The first skier then started to ski the slope.
On his third turn, he triggered a slab avalanche about one foot deep that
failed within the storm snow. He grabbed onto a tree and was able to stop
himself from being taken down slope. The avalanche then stepped down another
15-20 inches to a lower persistent weak layer and pulled this skier away from
his tree and down the slope into the trees below."

"This deep slab avalanche failed within a layer of faceted snow sandwiched
between two crusts. This known persistent weak layer is located just below the
old/new snow interface.
"The fracture was 481 feet wide (environ 146m) and ran 1235 feet (environ 376 m) through the trees downslope".

Voir les vidéos très intéressantes sur le site du Sierra Avalanche Center en cliquant sur le "lien vers une description".

Link verso un’altra descrizione
Osservatore: Sierra Avalanche Center
243 viste

Caratteristiche della valanga

Rotture: spessore 60 cm, max ? cm, lunghezza 146 m. 2320 m. ? m.
Lastrone soffice
Origine principale
Sciatore fuoripista
Qualità della neve
Asciutta farinosa

Avete più informazioni su questa valanga? Contattateci

Condizioni in questo periodo

Grado di pericolo del bollettino

Image indice de danger Inconnu

Nello stesso periodo

Nelle vicinanze

per capire meglio e proteggersi

Retrouvez toutes nos vidéos sur notre chaine Youtube