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Avalanche: Chugach State Park

Location: Ptarmigan Peak, 61.05733N, 149.60190W

Date:
Observer:
Route & General Observations

Approached via Rabbit Creek, ascended Ptarmigan southwest slopes. Little to no snow on slopes at elevations below 4300′, with exception of drifted snow in drainages. Avalanches observed in gullies opposite side of valley with northern exposure.

Avalanche Details
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Trigger Foot PenetrationAvalanche Type Soft Slab
Aspect South SouthwestElevation 4600ft
Slope AngleunknownCrown Depth 18in
Width 20ftVertical Run 150ft
Avalanche Details

Climber-triggered slab avalanche. 10" to 18" crown. First climber crossed safely, second triggered avalanche after a few steps.

Red Flags
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Observer Comments

None

Weather & Snow Characteristics
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Weather

Clear, light wind, -5F in shade, 18F in sun

Snow surface

Newer snow, slightly settled. Same snow was plastered to rocks up high.

Snowpack

Powdery, wind-deposited snow on top of very solid wind-deposited snow with facet layer in between. Facet layer approximately 1cm. Well-bonded to ground, ~6' snow depth. Both layers increasingly solid towards the ground.

Photos & Video
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