Avalanche

Avalanche: Gods Lawnmower

Rogers DOTSalt Lake
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Observation photo 1

Quick report

Slope Angle
38°

Avalanche

Slab Width
213 m
Weak Layer
Depth Hoar
Trigger Type
Natural
Vertical Fall
381 m
Avalanche Type
Hard Slab
Slab Thickness
91 cm
Start Zone Aspect
North
Avalanche Problem
Persistent Weak Layer
Start Zone Elevation
2987 m

Received report of a substantial slide in the Lawnmower early Sunday from a party who was in the area the day previous. Believed to have slid overnight 2/12. Observed the crown with clearing afternoon of 2/14 and went up to inspect today. Crown was staggered and broken but overall about 700' wide and anywhere from 2-6' deep. Areas along the flank were much shallower with a HS of just over 20'' in some places. Snowpack lacked any obvious temperature crusts or mid pack faceted layers and overall exhibited moderate strength, a fair bit of energy, and very poor structure with some of the most well developed facets I've observed so far this season. Some large areas of undisturbed snow left remaining high on the slope indicating the slide might have been triggered by some sloughing or spindrift from higher on the slope. Good clean out mid slope and debris ran to about 8400'. Did an okay job of laying down some of the willows and aspens just above the bench with a few larger trees mixed in the lot. Good indicator of potential for some of our other N facing paths but the poor structure, lack of previous activity, and still relatively thin HS at mid and low elevations has me skeptical those paths might hold on and deliver the large clean outs we're all hoping for. Hoping I'm wrong.