Avalanche: Turnagain

Location: Seattle Ridge

Route & General Observations

Lots of wind loading below Seattle Ridge. We were skinning through what later became the slidepath and noticed about 3 feet of soft wind loaded snow. At the top of our next run, we saw that the slope had ripped.

Contact, Location & General Observations
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Forecaster Comments

It is very likely this slide was remotely triggered while the party was on the ridge and the slope was out of view. Follow-up with a member of the party reported they felt a collapse while they were on the ridge.

Avalanche Details
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Trigger NaturalRemote Trigger0
Avalanche Type0Aspect Northwest
Elevation 2100ftSlope Angle 35deg
Crown Depth3ftWidth 600ft
Vertical Run 300ft  
Avalanche Details

Very soft slab.

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)?Yes
Cracking (Shooting cracks)?Yes
Observer Comments

We were able to see the recent avalanche off of Basketball (Magnum/Taylor Pass), which is a very similar aspect to this avalanche.

We saw some cracks open up on the apex of several convex terrain features nearby.

We saw some smaller sloughs in the area as well and got some whoomping on the flats of the ridge itself.

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

It was warm and the cracking, whoomping, and sliding all occurred at the warmest point in the day, right after the temperature seemed to climb a bit.

Snow surface

Soft, wind-deposited powder.

Photos & Video
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