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Observations

Region: Chugach State Park
Location: Ptarmigan - S. Couloir
Observer:
Date:

Route & General Observations

Strong headwind as we made our way up the valley. Turned around about halfway up due wind, stability concerns, and not wanting to be exposed to the high consequence terrain. I triggered a wind slab on our way down, broke below my feet and my partners were in a safe zone so it did not carry anyone.

Avalanche Details

Avalanche details

Trigger SkierAvalanche Type Hard SlabAspect North Northeast
ElevationunknownSlope AngleunknownCrown Depth 10in
Width 25ftLength 300ft  

Observer Comments

Skier triggered hard wind slab

Red Flags

Obvious signs of instability

Recent Avalanches?YesCollapsing (Whumphing)?NoCracking (Shooting cracks)?Yes

Observer Comments

Point releases on south facing slopes, started to get shooting cracks at our turnaround point.

Weather

Weather

Strong down valley wind, temperature was probably in the 20's

Snow Characteristics

Snow surface

Lower half of the run was soft, slightly wind affected powder. Transitioned into variable windboard with pockets of powder as we got higher up.

Snowpack

Hand pit tests showed that the wind affected snow was not bonding well to the old surface.



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