Remote triggered deep slab, Fisher

Fisher Mtn.
Cooke City
Code
HS-AMr-R3-D2.5-O
Elevation
10000
Aspect
NE
Latitude
45.06610
Longitude
-109.95900
Notes

On Dec 9, 2022 around 1:30pm we triggered a large, deep slab avalanche while riding across a lower angle slope below. This occurred on Fisher Mtn. near Cooke City on an east-northeast aspect at 10,000'. It broke 3-6+' deep and 300' wide. One rider was caught and carried, not buried, and luckily nobody was injured.

Number of slides
1
Number caught
1
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Snowmobile
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
3
D size
2.5
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
52.0 inches
Vertical Fall
600ft
Slab Width
300.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year