We suspect that this is a wet slab avalanche that released in the November facets on top of the Halloween crust. This weak layer structure has been observed throughout the Crow Pass area this winter and could produce more wet slab avalanches as melt water continues to weaken the snowpack as the spring progresses.
Observation: Girdwood
Location: SE face crow peak
Very large wet slab avalanche observed today that extended off a smaller one that slid prior to our arrival.
Forecaster Comments
The brown patch existed prior to our arrival. The larger slide and extension happened while we were there and entrained a very large amount of snow.