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Observations

Region: Anchorage Front Range
Location: Harp Ridge near South Fork of Eagle River
Observer:
Date:

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

Avalanche details

Trigger NaturalAvalanche Type Hard SlabAspect West Southwest
ElevationunknownSlope AngleunknownCrown Depthunknown
Width 25ftLength 500ft  

Observer Comments

Naturally triggered; rapid windloading at top of the gully.

Red Flags

Obvious signs of instability

Recent Avalanches?NoCollapsing (Whumphing)?NoCracking (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

Weather

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

Snow Characteristics

Snow surface

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

Snowpack

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

Photos



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