Skier triggered wet slab on Treasure Peak, East Face. D2

AVALANCHE OBSERVATION
Treasure Peak

Drainage:

Submission Info
Member
Sunday, June 2, 2019 - 1:00pm
Red Flags: 
Recent avalanche activity
Recent loading by new snow, wind, or rain
Rapid warming
Avalanche Type: 
Wet
Slab
Slope: 
35degrees
Trigger type: 
Skier
Crown Height: 
Less than 1 ft
Aspect: 
East
Avalanche Width: 
50ft.
Terrain: 
Above Treeline
Elevation: 
12 400ft.
Bed Surface: 
Old Snow
Avalanche Length: 
1 000ft.
More detailed information about the avalanche: 

While descending the East Face, our party (2) triggered multiple small
wet slab releases. These slides then caused further larger releases
from the center of the face. The combined avalanche ran the entirety
of the face. A crown was visible and the snow appeared to release as a slab on a firm snow layer.

Analysis:
We started late and without a clear objective, settling on Treasure
Peak due to its ease of access and clearly visible line. At the
beginning of the ascent we realized that the snow had not frozen
thoroughly and was soft and wet with penetration beyond boot top.

We discounted the warning signs because of the overcast and breezy
weather, an obviously wrong way to evaluate hazard. Both of us have
had significant avalanche training and observations. We had the
information and knowledge to know to turn around. Due to the "small"
and casual nature of our objective, we did thoroughly analyze the snow
conditions.

Avalanche Photos: 
Blowing Snow: 
Yes
Cloud Cover: 
75% of the sky covered by clouds
Air temperature: 
Above Freezing
Wind Speed: 
Light
Precipitation: 
Snow
Air temperature trend: 
Cooling
Wind Direction: 
West
Accumulation rate: 
Less than 1 in. per hour
More detailed information about the weather: 

Thunderstorms and spotty snow showers. Mostly overcast. The night had been warm and the snow had not fully frozen.

37° 23' 30.8184" N, 118° 46' 17.4864" W

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