Size 2.5-3 , surface hoar suspect

Sunday march 9th, North east aspect between 1800-1400 meters . Pictures are of a slide while snowboarding. On the way Snowmobiling up millers ridge we remote trigger a couple slides while on the FSR. We already got our sign that surface hoar was kicking around. We had ridden in a sheltered area beside this cliff/pillow feature for two laps . On our third lap we moved 5ft closer to where the crown was and it remote triggered a slide of all the storm snow approx. 80-100cms. The slide ran out about 400-500 ft (red line) all the way past the opening back into treeline. Would classify it as a size 2.5-3 as it would have likely come close to burying a small car. I would treat most slope you ride in the future to be suspicious of having surface hoar .