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Avalanche: Girdwood

Location: Alyeska

Date:
Observer:
Route & General Observations

A gun mission at Alyeska produced several D3 avalanches on Max’s NE face, Shadows, and Headwall, all Northerly aspects. Debris from Max’s Chute ran to International Corner the debris from the Headwall reached Silvertip. A large soft slab trigged by artillery on Headstone initiated a large wet slab at 1800′. See photos below.

Avalanche Details
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Trigger ExplosiveAvalanche Type0
Aspect NorthElevation 1800ft
Slope AngleunknownCrown Depthunknown
WidthunknownVertical Rununknown
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
Weather & Snow Characteristics
Please provide details to help us determine the weather and snowpack during the time this observation took place.
Weather

Rain and heavy wet snow reached this elevation several times over the last week.
Over 2.5" of water fell within the 24 hours prior to gun mission
Ridgetop winds 20's mph gusting to 50's mph.
Briefly clear skies during gun mission, but snow and winds obscured visibility during day light hours

Photos & Video
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