Avalanche: Juneau Mainland

Location: Ptarmigan Ridge

Route & General Observations

I was eating lunch on Canyon Ridge off Blackerby when I observed a natural avalanche on the other side of the bowel. I suspect the avalanche was triggered by wind loaded snow.

On my way up Blackerby ridge, I observed between 10 to 20 centimeters of fresh snow poorly bonded to an icy surface. I occasionally encountered shooting cracks up to three feet long. Test slopes occasionally produced slabs on the new/old snow interface.

I stayed on low angle and heavily wooded terrain as much as possible.

Avalanche Details
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Trigger NaturalAvalanche Type Unknown
Aspect WestElevation 3000ft
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Run 100ft
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)?Yes
Observer Comments

Shooting cracks up to 3’. Recent avalanches on west facing slopes.

Weather & Snow Characteristics
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Really windy. At the location of the observation it was blowing from the NW.

Photos & Video
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