I saw this avalanche today and it didn't look ancient so I thought I would go take a closer look. It was snowing pretty hard and so I couldn't really tell how old it was but I didn't see it on the avalanche list so hopefully this isn't a repost. I did dig a pit on a small test slope nearby and it looked like the weakest interface was the 30 cm of depth hoar at the bottom of the snow pack however my ECT yielded no result and I wasn't able to do a PST.
Forecaster's Note: After soliciting info from our observers, it turns out this slide was from the last avalanche cycle, around the 12th or 13th. Thanks to those who helped up out!
In other news, there were some pretty cool needles falling out of the sky and there was a layer of really big Graupel (3-4mm) that was resting on top of the old snow. (see photo)