Road observations
Multiple crowns, estimated ranging 30-150 ft. wide near the top of Path 1163. Appeared to be storm/wind slabs with debris entraining some wet snow on the way down terminating about 2/3rds path. Observed around 1400 and suspect these ran last night/early this morning, Dec 20. Westerly winds were actively re-loading this face at time of observation.
I turned around after checking out Path 1163 and saw this nasty thing on the N face of Furlong. Unfortunately my view of the avalanche was very limited and I'm guesstimating on the slab dimensions. I could not see the debris or runout at all. But from the photo it appears a cornice fall likely triggered the slab below on the cliffs then this debris triggered the big slab lower on the slope. Hard saying but that crown could be 4+ thick in places? Looks like failure was on some old facets near the base of the pack. Obviously a wind-loaded slope that made for a thicker slab. And it had been re-loading for while before I took this picture, so thinking this avalanche ran last night/early morning.
