Avalanche: Chugach State Park

Location: Harp Ridge near South Fork of Eagle River

Route & General Observations

We parked at the base and skied up the right gully, and turned around halfway up due to snow pack instability. As we skied to the base of the gully we saw an avalanche in motion that was naturally triggered in the gully next to us.

Avalanche Details
If this is an avalanche observation, click yes below and fill in the form as best as you can. If people were involved, please provide details.
Trigger NaturalAvalanche Type Hard Slab
Aspect West SouthwestElevationunknown
Slope AngleunknownCrown Depthunknown
Width 25ftVertical Run 500ft
Avalanche Details

Naturally triggered; rapid windloading at top of the gully.

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?No
Collapsing (Whumphing)?No
Cracking (Shooting cracks)?Yes
Observer Comments

Wind slabs, shooting cracks further along the gully, cornices. First obvious signs of instablity occurred at an angle of 42 degrees.

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

Sunny, temps at around 0 degrees F. Very windy on exposed terrain.

Snow surface

Wind crust on exposed terrain. Fluffy powder further down the mountain below gullies.


Informal instability tests were done with ski poles and snow pits. Enough data to find out the slope was too unstable for further travel.

Photos & Video
Please upload photos below. Maximum of 5 megabytes per image. Click here for help on resizing images. If you are having trouble uploading please email images separately to staff.