Event as observed by Group B:
"We, a party of two, skinned up to the top of Gordon Lyon and decided to ski back into Tequila Bowl instead of dropping into the north side. We then skinned back up to the next gut to the west, between Gordon Lyon and the Nike site. We observed the last two of a party of three [Group A] ski that shot and then followed ourselves. As we were starting to skin up the ridge to the west that is below the Nike site, we watched another party of three [Group C] ski the next shot to the west. [Group A] decided to skin back up the ski line, but worked more onto the face to the east. When we were most of the way up the ridge, we looked over and saw the slope begin to slide. We also observed the slide propagate sympathetically onto the face of Gordon Lyon. The third member of [Group A] was caught, carried and buried, and the second member appeared to be caught and carried but was able to self arrest."
Event as described by Group C:
"[Group A] skied into bowl north of arctic valley. They proceeded to skin up a NNW slope approximately 25 to 30 degrees. The slope ripped as they were less than half way up. 1st skinner was off slab (above and to side), 2nd and 3rd skinners were caught and carried. 1 deployed avy bag and remained above debris, he was able to free himself. Second (unsure if they had avy bag) was carried and partially buried with head and at least one arm above debris. The avalanche sympathetically wrapped around to the bowl just below and to north of Gordon Lyon proper, and that whole bowl ripped, with slide debris extending well down the valley."