From an email: "...went up the Ribbon on the north shoulder of Elephant Mountain. Overall found a pretty stable snowpack, but did find some reactive layers where it had been wind loaded. Attached picture was near the top where the wind was loading the upper bowl of the chute off the ridge line. There was a variable 1-4” thick windslab that broke and propagated easily on the denser snow below."
Number of slides
Soft slab avalanche
c-A controlled or intentional release by the indicated trigger
I - Interface between new and old snow
Slab Thickness units