I am going to start this off with this being my first ever observation and totally open to feedback!
Headed out today to check out the couloir on the south aspect of Lundin Peak. The D2.5-3 activity in the photos was a few days old from the last storm cycle. Snow today was very stable - compression test reveled NF. There is a 6 inch or so crush on the top, followed by 4+ feet of moist, compact snow. Slide appears to have started close to the peak around 5800' and slid down to around 4500' . On my way back, I stayed on the skiers left of the commonwealth creek and discovered more slide activity off of the SW aspect of Red mountain from a few days prior.