Avalanche: Turnagain

Location: Main Bowl, Turnagain Pass

Route & General Observations

Standard moto uptrack to Main Bowl.

Avalanche Details
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Trigger SnowmachinerRemote Trigger Unknown
Avalanche Type Soft SlabAspect Southeast
Elevation 2400ftSlope Angleunknown
Crown Depth 24inWidth 300ft
Vertical Run 100ft  
Avalanche Details

Three snowmachine triggered avalanche in Main Bowl today. I investigated one and found the Solstice BSH was weak layer, about 60cm down. Confident this was also the weak layer in the other two avalanches.
At least two of three slopes that avalanched had multiple tracks prior to avalanche.

Red Flags
Red flags are simple visual clues that are a sign of potential avalanche danger. Please record any sign of red flags below.
Obvious signs of instability
Recent Avalanches?Yes
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?No
Observer Comments

Recent avalanches.

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

Calm winds. Single digit temps and high clouds.

Snow surface

12-20” low density snow from NYE storm.


Melt freeze crust from early in NYE storm is present below about 2200’. It disappears in the 2200-2300’ elevation band.
No formal stability tests but all three avalanches failed on buried surface hoar 50-60cm down.

Photos & Video
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