Went to look at the slide from a few days ago up by Promontory/ Tollgate just outside Park City and see if it failed on either NSF or Surface Hoar. Gilmore in his observation was correct about it likely being NSF.

I found NSF on top of a pencil hard crust around 45cm down. Looked like...HS-AS-U-R1-D1.5 Hard blocky avalanche debris. Seamed to be triggered either remotely or unintentionally. He might have remotely triggered it from up higher although it looked like the skier triggered it from the left flank in a thin area of the snowpack only 85cm deep. The avalanche had some evidence of cross loading. Crown ranged in height 25cm to 75cm. A number of melt freeze crusts in the snowpack. Possibly the weakest snowpack I have seen all season in the Wasatch which makes sense for its location. Avalanche looked to be triggered from a thin spot in the snowpack only 85cm deep on the left flank. I did two ECT's on the crown. ECTP22 Q1 SP down 85cm. The other ECTP19 Q3 down 35 on those NSF that this avalanche occurred on.

Strength- Moderate Took a fair bit of force but definitely not strong.

Structure- BAD...Lots of lemons. Weak layer depth was less than a meter, hardness difference of more than one step, facets as the weak layer, grain size difference and a weak layer thickness of less than 10cm.

Energy- High to Moderate Q1 ECT score with a sudden planar failure and a Q3 in another location of the crown.

Definitely not a confidence inspiring snow pack in this location.