Snowboarder triggered/caught small slide on Buck Ridge

Buck Ridge
Southern Madison
Code
SS-ARu-R2-D1.5-I
Elevation
9200
Aspect
NE
Latitude
45.17190
Longitude
-111.38000
Notes

Location: 45.165, -111.35808 (onX) 

Elevation: ~9,200 feet

While riding a small NNE facing slope near the trail on Buck Ridge, a snowboarder triggered and followed a cornice slide that propagated approximately 75 feet and slid about 20' vertical. The one rider was caught and carried approx. 10' and ended up buried upright, waist deep with no injuries. 

 

Number of slides
1
Number caught
1
Number buried
1
Avalanche Type
Soft slab avalanche
Trigger
Snowboarder
Trigger Modifier
u-An unintentional release
R size
2
D size
1.5
Bed Surface
I - Interface between new and old snow
Problem Type
Wind-Drifted Snow
Slab Thickness
10.0 inches
Vertical Fall
20ft
Slab Width
75.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year