Avalanche: Ivory Flakes

Observer Name
mark white
Observation Date
Wednesday, March 4, 2015
Avalanche Date
Wednesday, March 4, 2015
Region
Salt Lake » Big Cottonwood Canyon » Cardiff Fork » Ivory Flakes
Location Name or Route
Ivory Rock slabs
Elevation
10,300'
Aspect
East
Trigger
Skier
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Soft Slab
Avalanche Problem
Persistent Weak Layer
Weak Layer
Facets
Depth
2'
Width
80'
Vertical
800'
Comments

Not sure of the details on how this slide was triggered, just that it was skier triggered. Showed up about a half and hour after it occurred. Ripped out up high on the rock slab, most likely a wind load from the NW winds yesterday, crown appeared to be a couple feet deep and 80 or so feet wide, it ran about 800 vertical until it reached flatter terrain, definitely big enough for a burial, but the real scary thing is the rocks and cliffs it released on. Thinking someone got real lucky but don't know the facts, hopefully they will relay the details to the UAC. Photos whole deal, and the crown.

Comments

FORECASTER NOTE: Here's a bit more on this avalanche from the victim who sent in his narrative and a photo.

After assessing conditions, first skier went in and made hard cuts to check snowpack and set outer boundaries for skiers to observe/follow - no problem observed. Second skier in made hard turns - no problem. Third skier (me) in - after two turns below coming in under the cornice, I observed the snow below me breaking loose, I turned my head and saw that the avalanche was in full swing above/below/around me, which eliminated a ski out/outrunning option - the fourth skier (observing from cornice above), saw the slide begin, surround me and screamed "PULL PULL PULL!!!" which confirmed to me that I was in an active avalanche and that I needed to activate my ABS Bag - I pulled my ABS Bag trigger - the bag fully deployed (I will cherish forever that "hissing" sound as it inflated!) - and then I went for one heck of a ride - I came to rest at the lower portion of the debris field below the rocks, face up, partially buried with all equipment off. The fourth skier came around the from the top of the debris field, beacon set to receive, saw me give him the "thumbs up", skied from one debris field across to the one I was in and assisted in helping me out. While digging out, me and fourth skier hear multiple "whumps" as snow around us settled. IMPORTANT note: the ABS Bag was a lifesaver - no question, no hesitation - I was kept on top of the slide which pulled me over the rocks (I continued to see light filtering through the snow as I tumbled and "swam") - I suffered minor injuries (hamstring tweak from a ski initially staying on and minor arm bruising) - absolutely NO hits to my head (helmet was free of any markings). Anyone who questions the efficacy of a Avy Bag (ABS in this case): I'm living proof that it works. NOTE: My family is UNAWARE of what transpired so my name is not included.