~20-30 new snow last 48-72 hours with period of rain forcasted to hit early previous evening before tranisiting back to snow in the AM. Strong SW winds
Skied at Tam MacAuthur Rim on Sat (3/29) but called it after one lap based on avy observations. Our pit work showed weaknesses (CT11-24) with decent shear quality (Q1+ to Q2-) at a couple of places in a very wet/heavy storm slab and at its interface to the pre-storm snowpack about 2 ft down - but no full propagation on our ECT.Our plan was to work our way up on conservative terrain and put in another pit, but soon came across a fresh crown ~ 30 feet across, maybe 1-2 ft thick. It propagated on rocks in an open patch of trees but ran well through them to a bench ~ 100 yards below. All of this was at the base of the cliffs S/SE of the 3 Sisters Huts, 7000ftFor obvious reasons we didn't get close enough to investigate very well. From where we stood there was no evidence of ski tracks entering or exiting suggesting it was naturally triggered. It also looked like there was 1-2'' of new snow on top of the debris so it likely released sometime that morning or night before, possibly from the rain that had been forecasted to hit that night.About that same time another ski party came by and reported setting off a similar sized slide/depth close by which made the decision to bail all the more conclusive.