Lionhead Range

Snowmobiler Triggered Avalanche Centennial Mountains

Hellroaring Creek
Island Park
Code
SS-AMu-R2-D2-O
Elevation
8200
Latitude
44.54900
Longitude
-111.47500
Notes

A group of snowmobilers triggered an avalanche on a low-elevation slope in the Centennial Mountains as they rode near the bottom of a steep slope. No one was caught. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Snowmobile
Trigger Modifier
u-An unintentional release
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
24.0 inches
Vertical Fall
100ft
Slab Width
150.00ft
Attached Videos
Snowmobiler Triggered Avalanche Centennial Mountains
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

Remote Triggered Avalanche Lionhead

Lionhead Ridge
Lionhead Range
Code
SS-AMr-R3-D2.5-O
Aspect
E
Latitude
44.71450
Longitude
-111.31800
Notes

A group of riders triggered a large avalanche on Lionhead Ridge as they traveled in nearby terrain that was much less steep.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft 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
Images
Large, remote avalanche Lionhead
Snow Observation Source
Remote Triggered Avalanche Lionhead
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

Remote Triggered Avalanche Lionhead

Date
Activity
Snowmobiling

From IG: “Here is a big avalanche remotely triggered yesterday up lionshead area”

Region
Lionhead Range
Location (from list)
Lionhead Ridge
Observer Name
Tommy Urell

Multiple recent avalanches

Date

From IG 2/10/24: “Multiple avalanches in the northern lions head on the eastern half of the compass. All were at around 8,500 feet.”

Region
Lionhead Range
Location (from list)
Lionhead Ridge
Observer Name
Owen Desroches

Two Natural Avalanches near Hebgen Lake

Hebgen Lake
Lionhead Range
Code
SS-N-R2-D2-O
Elevation
9000
Aspect
E
Latitude
44.83810
Longitude
-111.34300
Notes

Skiers on 02/10/2024 saw two avalanches near Hebgen Lake while ascending an east-facing slope at 9000'. These likely broke 24-48 hour prior to when it was observed. 

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Width
500.00ft
Images
Old avalanche crown with new snow
Two More Avalanches, Hebgen Lake
Snow Observation Source
Recent Avalanches near Hebgen
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
23-24

Natural Avalanche Near Hebgen Lake

Hebgen Lake
Lionhead Range
Code
SS-N-R2-D2-O
Elevation
9000
Aspect
E
Latitude
44.83810
Longitude
-111.34300
Notes

Skiers near Hebgen Lake saw a recent avalanche, within the last 12 hours, while ascending an east-facing slope at 9000'. They noted that the avalanche ran "to the trees, almost full path". 

 

 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
24.0 inches
Slab Width
200.00ft
Images
Old Natural Avalanche Hebgin
Natural Avalanche, Hebgen Lake
Snow Observation Source
Recent Avalanches near Hebgen
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

From obs: "There were shooting cracks everywhere, and it looked like the cracks propagated into a slab that would have broken up more if the slope had been steeper. It almost looked like a crevasse field with how many cracks there were. Photo is included but I don't think shows just how broken up that "relatively benign" terrain was. I have never seen anything like that before! " Photo: H. Darby

Lionhead Range, 2024-02-10
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