Snowpack

Observation: Emma Ridges

Kelly, Pressman, Basham, McCoy-SulenticSalt Lake
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Observation photo 1

Quick report

Aspect
South
Red Flags
Heavy Snowfall
Elevation
2865 m
Slope Angle
27°
Red Flags Comment
<p>Heavy snowfall-lower density snow fell in the first 1-2" and this was the layer that the new snow avalanches were sliding on. Areas over 37-38 degrees had avalanched naturally while terrain around 35 degrees avalanched with ski cuts. We noted no avalanche activity breaking down below the new snow. North facing slopes had loose dry sloughing isolated to steep terrain. </p>

Extended column test results with non-planar propagation above the ice lens.

Photo 1- Density inversion within the new snow

Photo 2- Skier triggered new snow/wind-drifted soft slab avalanche on east facing slope 9400' 4-6" deep, 60' wide

Snowpack

Instability Comment
<p>New snow that had bit of wind was propagating further with ski cuts than areas without wind-affected snow. </p>

Old snow surface on south facing slopes was firm and solidly refrozen.