Avalanche: Summit

Location: Avalanche triggered in Tenderfoot Trees

Date:
Observer:
Route & General Observations

Some whoomphing at the bottom at less 5% slope; skinned up Northwest aspect and skied north shot in the TREES.

 

*An avalanche investigation was done the following day by CNFAIC forecaster, Wendy Wagner, and more info about snowpack structure and terrain can be found HERE.

Crown of a human triggered slab in the trees on a NW aspect of Tenderfoot

Crown of a slab triggered by a snowboarder in the trees on a NW aspect of Tenderfoot

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OLYMPUS DIGITAL CAMERA

Avalanche Details
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Trigger SnowboarderAvalanche Type0
Aspect NorthwestElevation 2300ft
Slope Angle 28degCrown Depth3ft
Width 125ftVertical Run 150ft
Avalanche Details

We were a party of five + 2 K9, on the second lap. The last skinner heading up heard a whooph and a 3' deep 150' long slide occurred. Skier moved 10'staying atop and stopped. Skier watched dog try to get out and then dog was swallowed by the avalanche. Dog self rescued as the slide stopped. Slide was in the trees with numerous anchors. Using cell phone app and personal experience slope was estimated at 20 degrees at most.

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

Whoomping only at very low angle below.

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

Snowing like it does in my dreams.
Low to moderate wind on the west aspect while skinning up above the trees to the "first knob".

Snow surface

Variable up to 16" new snow

Snowpack

Informal hand pits. Most likely failed on the deeper of the 2 surface hoar layers, see Heather's 1/1/16 observation

Photos & Video
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