22-23
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 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
Images
Attached Videos
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
On Dec 9, 2022 around 1:30pm we triggered this avalanche while riding across the lower angle slope below. It broke 3-6+' deep and 300' wide. One rider was caught and carried, and luckily nobody was injured. Photo: GNFAC
Avalanche Details: Remote triggered deep slab, Fisher
Forecast link: GNFAC Avalanche Forecast for Sat Dec 10, 2022
Cooke City, 2022-12-09
Forecast link: GNFAC Avalanche Forecast for Sat Dec 10, 2022
On Dec 9, 2022 around 1:30pm we triggered this avalanche while riding across the lower angle slope below. It broke 3-6+' deep and 300' wide. One rider was caught and carried, and luckily nobody was injured. Photo: GNFAC
Avalanche Details: Remote triggered deep slab, Fisher
Cooke City, 2022-12-09
On Dec 9, 2022 around 1:30pm we triggered this avalanche while riding across the lower angle slope below. It broke 3-6+' deep and 300' wide. One rider was caught and carried, and luckily nobody was injured. Photo: GNFAC
Avalanche Details: Remote triggered deep slab, Fisher
Cooke City, 2022-12-09
On Dec 9, 2022 around 1:30pm we triggered this avalanche while riding across the lower angle slope below. It broke 3-6+' deep and 300' wide. One rider was caught and carried, and luckily nobody was injured. Photo: GNFAC
Avalanche Details: Remote triggered deep slab, Fisher
Cooke City, 2022-12-09
I dug a pit above Silken Falls in the gulley. I found a weak layer of facets breaking about 10" under a wind slab (ECTP15). We did not get any cracking, but the terrain is very serious and even a small slide could be deadly. We did not feel comfortable center punching up the gully. Given how much traffic the gullies are getting, I do not think it is widespread, but it's out there and could avalanche.
Wind and snow this weekend may make this layer more unstable, so it's important to be careful crossing exposed terrain. Either rope up or tun around if it is suspect.
I dug a pit above Silken Falls in the gulley. I found a weak layer of facets breaking about 10" under a wind slab (ECTP15). We did not get any cracking, but the terrain is very serious and even a small slide could be deadly. We did not feel comfortable center punching up the gully. Given how much traffic the gullies are getting, I do not think it is widespread, but it's out there and could avalanche.
Wind and snow this weekend may make this layer more unstable, so it's important to be careful crossing exposed terrain. Either rope up or tun around if it is suspect.