Avalanche

Avalanche: Middle Cirque

TrenbeathMoab
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Avalanche

Slab Width
21 m
Trigger Type
Natural
Vertical Fall
38 m
Avalanche Type
Soft Slab
Slab Thickness
91 cm
Start Zone Aspect
Northwest
Avalanche Problem
Wind Slab
Start Zone Elevation
3475 m

This avalanche occurred during a severe wind loading event with 13" of new snow and sustained 35-45 mph winds. We had been tracking a spotty layer of facets that was covered up on Valentines Day. It is unknown if this avalanche failed on that layer or on the Feb 22 Interface.

On the day this avalanche was observed we dug a snowpit on NE aspect at a lower elevation and noted the following weak layers/interfaces.