Snowmobiler triggered Avalanches (2) near Lulu Pass, Cooke City

Lulu Pass
Cooke City
Code
HS-AMu-R3-D3-O
Elevation
10200
Aspect Range
E-N
Latitude
45.07090
Longitude
-109.95800
Notes

A rider on 02/23/2024 triggered a large avalanche on the north side of Fisher Mountain near Lulu Pass. He was caught and carried downhill but luckily was not buried or injured. On the east side of the mountain, another avalanche was observed by the party and likely happened at the same time. This avalanche either happened sympathetically from the large slide or was remotely triggered by the rider. 

Number of slides
2
Number caught
1
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Snowmobile
Trigger Modifier
u-An unintentional release
R size
3
D size
3
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
36.0 inches
Vertical Fall
200ft
Slab Width
200.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year