Watersprite Lake

Date/heure de l'avalanche

dimanche 4 mars 2018 à 12 h 45

Estimation de l'heure d’occurrence de l’avalanche

> 24 à 48 heures

Nombre d'avalanches dans ce rapport

1

Taille de l’avalanche

2

Épaisseur de la plaque

100cm

Largeur de la plaque

75m

Longueur d'écoulement de l'avalanche

200m

Versant de la zone de départ

• S

Bande d'altitude de la zone de départ

• Limite forestière

Altitude de la zone de départ

1 750m

Inclinaison de la zone de départ

35°

Altitude de la zone de dépôt

1 540m

Observations estimated from a party that reported: Picture didn’t come out all that well but you can see a bit of the crown on the right where it propagated big. It’s a 1’ crown on the left of the pic (start zone) and a 4’-6’ crown on the right. Ran down past the guy standing in the pic on the bottom right. This bowl is located is the first valley on the left (north) after you walk across the lake (east).

We were all ok thanks to terrain management and going one at a time (avy 1 training)... but we did not expect that slope to go that day, and especially not that big or run that far. Especially considering the relative stability we observed the prior day and the forecast of to moderate to considerable at and above treeline.