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Observation: Mid Ivory

Observation Date
12/24/2020
Observer Name
P Diegel, P Lambrose, L Dunn, B Ruling
Region
Salt Lake » Big Cottonwood Canyon » Cardiff Fork » Mid Ivory
Location Name or Route
Middle Ivory
Red Flags
Red Flags
Recent Avalanches
Wind Loading
Cracking
Collapsing
Poor Snowpack Structure
Avalanche Problem #1
Problem
Persistent Weak Layer
Problem #1 Comments
We heard and felt multiple collapses. We isolated a column at about 9800 ft. It failed with a gentle tug about 35 cm deep, with the top piece that popped off cohesive enough to gently lift out of the hole intact. The failure plane was quite clean and smooth (Q1) and showed a mix of facets and graupel. So spooky enough to keep our slope angles down.
Comments
No indication that the PWL is gaining any strength. More snow > big problems
Today's Observed Danger Rating
Considerable
Tomorrows Estimated Danger Rating
Considerable
Coordinates