Skier Triggered Wind Slab in Convict Area

AVALANCHE OBSERVATION
Convict Area- near Morrison Col

Drainage:

Submission Info
Volunteer Observer
Sunday, January 13, 2019 - 12:45pm
Red Flags: 
Recent loading by new snow, wind, or rain
Avalanche Type: 
Slab
Slope: 
35degrees
Trigger type: 
Skier
Crown Height: 
Less than 1 ft
Aspect: 
North
Weak Layer: 
Storm Snow
Avalanche Width: 
150ft.
Terrain: 
Above Treeline
Elevation: 
10 900ft.
Bed Surface: 
Storm Snow
Avalanche Length: 
100ft.
Number of partial burials: 
0
Number of full burials: 
0
More detailed information about the avalanche: 

HS-AS-R1-D1

Toured toward Morrison Col from the southeast. Upon reaching a small ridge on the south side of the East Bowl across from Morrison Col it was apparent the slope entering the bowl was windloaded and a very small cornice was forming. The wind slab was very sensitive and easily triggered from the ridge. Before and after pictures are attached. The upper portions ran only 10-15' into the gentle upper bowl, however the lower portion of the slab ran approx 100' on slightly steeper terrain. One at a time, we crossed the bed surface and traversed to the col. Significant wind loading was apparent on the north side of the col and we opted to ski the East Bowl down. 

Avalanche Photos: 
Blowing Snow: 
Yes
Cloud Cover: 
Clear
Wind Speed: 
Light
Precipitation: 
None
Air temperature trend: 
Warming
Wind Direction: 
Southwest
Accumulation rate: 
None
Convict Area- near Morrison Col 37° 33' 43.4196" N, 118° 51' 4.0212" W

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