Skier triggered avalanche coldstream

Heavy snowfall with lots of wind. Wind  was primarily from the Southwest but was swirling on the ridge tops. We chose to ski a more south facing aspect to avoid heavy wind deposition.  The fourth and last skier in the group skied just to the left of the others, going to the east of a small sub ridge.  We estimated the slope angle at just under 30 degrees, but it measures closer to 32-34 on Caltopo.  There was a very short rollover that acted as the trigger zone, maybe 20 feet and just over 35 degrees (in the flat light and with all the new snow it didn’t look that steep). The slope cracked and released slowly and the skier was able to anchor a ski pole into the bed surface as the snow moved around him. The crown was about 6-8” and it ran for maybe 120’. 

We then entered he trees and did not observe any sign of instability