Avalanche: Lawnmower Trees

Observer Name
Garcia
Observation Date
Tuesday, March 12, 2024
Avalanche Date
Tuesday, March 12, 2024
Region
Moab » Gold Basin » Lawnmower Trees
Location Name or Route
Lower Lawnmower Trees
Elevation
10,500'
Aspect
Northeast
Slope Angle
36°
Trigger
Skier
Trigger: additional info
Unintentionally Triggered
Avalanche Type
Hard Slab
Avalanche Problem
Wind Drifted Snow
Weak Layer
Facets
Depth
12"
Width
25'
Vertical
100'
Comments
I was digging a pit in the moraines just up canyon from Tele Gold when I heard a male voice yell, "Avalanche! Avalanche! Avalanche!" I stopped what I was doing and skied towards the slope where I heard the yelling. By the time I got to the slide, the party had left. There was one ski track in, which triggered the slide, and three tracks out the bottom. This was a small slide, it is unknown whether the skier was caught and carried. This was certainly not big enough to bury a person, but it was a foot deep and could easily push you into some trees or over a cliff band.
The weak layer was faceted snow. This is the same layer of VERY weak, faceted snow that Mark and I identified on Friday 3-8 while touring up Corkscrew Glades. I spent the rest of the day tracking this weak layer. It seems to be very spotty and isolated to sparsely treed Northerly facing slopes near treeline and below. This unlucky skier happened to find the right combination where this layer existed and also had a fresh wind-drift sitting on top waiting for a trigger. This layer is not widespread enough to be a full-on PWL problem type, but it deserves to be on everyone's radar. We are expecting snow and wind for the next several days. This weak layer will be very sensitive with any sort of slab on top.
The weak layer is easily seen in this photo. The crown is seen in the background.
Coordinates