Avalanche Occurrence
General Information
Observer:
NWAC Forecaster
Occurrence Date:
Dec 31, 2021 ()
Location:
Shuksan Arm
Comments:
A very large natural avalanche was witnessed Friday morning on the Shuksan Arm. The slope was actively wind loading. It was a steep, unsupported slope.
Avalanche Characteristics
# of Avys:
1Aspect:
NW (N,NW)Start Zone Elev:
5500ftSize:
D3 / R2Type:
HS-Hard SlabTrigger:
N-NaturalBed Surface:
O-Old SnowDepth:
3.5ft (max: 5ft)Width:
490ftStart Zone Slope:
40°Vertical Fall:
1000ftComments:
Weak layer: Solstice Crust/SH layer (at this elevation minimal moistening occurred therefore there was not as substantial a crust). The surface hoar which was on the surface at that time remained intact.
Media
