From e-mail: "A ski cut at the top of the slope produced a soft slab avalanche (R2 D2 SS). The crown was 10" deep and 60' wide. Several other skiers had skied a line to the skiers right of our route with no obvious signs of instability or avalanches. No natural avalanches were observed with the exception of some small wet point release slides on the E face of Mt Blackmore."
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