Large collapse hyalite

Was attempting to find a few small safe powder pockets up in hyalite today. Was pretty unsuccessful, collapsing was happening the entire ski up but didn’t seem to be super unstable. Soon as I got the some open low angel area I had a major collapse probably 50 foot circle around me that was very loud. At this point I turned around. Snow was very different depths all the way up. Areas I could put my poles (110) almost under the snow other places the snow was only inches. Also noted a hard layer about 6 inches down that was good snow with light powder on top and sugar underneath. 
 

(Was skining up the road to the strip east of the peak.)