Avalanche: Turnagain

Location: Center Ridge

Route & General Observations

Alaska Avalanche School Rec Level 1 Group toured up standard “Orange Diamond” route to 1700′ on Center Ridge.

Avalanche Details
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Trigger UnknownRemote Trigger Unknown
Avalanche Type UnknownAspect Unknown
ElevationunknownSlope Angleunknown
Crown DepthunknownWidth 50ft
Vertical Run 300ft  
Avalanche Details

Noticed an new dry loose avalanche in Hippy Bowl. Appeared to begin from ridgeline (possibly cornice triggered) and stopped before the bottom of the bowl, estimated about 50' wide, unsure if human or natural trigger.

Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.

Beautiful day at Turnagain Pass, calm winds, mostly clear sky, and cooling temps in the high teens throughout the day.

Snow surface

We observed a couple inches of fluffy new snow on the surface all the way to our high point. From the trail head to about 1250' we could feel and hear a thin melt freeze crust lurking just below last nights new snow. Travel conditions were quite pleasant as this MF crust was breakable and not too grabby. Above 1250' as the crust yielded to soft settled pow we found great ski conditions.


Our goal for the day was to investigate how the New Year's crust was handling this past week's storm snow. In our pits at 1700' we found the New Year's crust about 50cm's below the surface, with no tests failing on top of the crust.

Aleph's Group was in the same neck of the woods, along the back door to Tincan and reported-
No signs of instability
Breakable melt-freeze crust just below the new snow at the parking lot. This crust got thinner with elevation.

Pit was dug at 1200', West Aspect, 24° slepe, HS: 170
CT13 Q1, ECTP14 40 cm down in the middle of a mini crust sandwich from 1/10. Failed in 4 cm of decomposing precipitation particles that were slightly faceted in between the 2 small crusts. Not all pits dug in this location had propagation on this layer.
CT 21 Q1, ECTN 20 60 cm down on the small rounding facets on the NYE crust

Photos & Video
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