Cooke City

Rider-Triggered Avalanche SW face of Sheep Mountain

Sheep Mountain
Cooke City
Code
SS-AMu-R2-D2-O
Elevation
9900
Aspect
SW
Latitude
45.07220
Longitude
-109.92800
Notes

From Obs: "On the morning of Sunday February 6, a snowmobiler triggered a slide in new snow on the SW face of Sheep Mountain. The slide triggered remotely while the rider was lower on the slope and he was not caught (the visible track is not from the rider who triggered the slide , his track was buried in the debris field). The crown was about 18" deep and 75 feet wide and the slide and the slide ran about 250 feet."

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
18.0 inches
Vertical Fall
250ft
Slab Width
75.00ft
Weak Layer Grain type
Faceted Crystals
Weak Layer grain size
1.50mm
Weak Layer Hardness
F
Slab Layer Grain Type
Precipitation Particles
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

From Obs: "On the morning of Sunday February 6, a snowmobiler triggered a slide in new snow on the SW face of Sheep Mountain. The slide triggered remotely while the rider was lower on the slope and he was not caught (the visible track is not from the rider who triggered the slide, his track was buried in the debris field). The crown was about 18" deep and 75 feet wide and the slide and the slide ran about 250 feet." Photo: C Mozol

Cooke City, 2022-02-07

Rider triggered slide on SW face of Sheep Mountain

On the morning of Sunday February 6, a snowmobiler triggered a slide in new snow on the SW face of Sheep Mountain. The slide triggered remotely while the rider was lower on the slope and he was not caught (the visible track is not from the rider who triggered the slide, his track was buried in the debris field). The crown was about 18" deep and 75 feet wide and the slide and the slide ran about 250 feet. 

Activity
Snowmobiling
Date
Email
mozol28@yahoo.com
Latitude
45.07
Location (from list)
Title of your observation
Rider triggered slide on SW face of Sheep Mountain
Longitude
-109.93
Observer Name
Chad Mozol
Phone
4064147404
Region
Similar Regions
Share Snow Obs
On

Natural Avalanches Woody Ridge

Woody Ridge
Cooke City
Code
SS-N-R2-D2-I
Elevation
10250
Aspect
E
Latitude
44.97390
Longitude
-109.92400
Notes

From Facebook, "East side of Woody Ridge has several natural slab avalanches this morning. All appear to be triggered by Loose Dry naturals and looked to be 1-2' deep. Main face of Climax went R3"

Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
I - Interface between new and old snow
Problem Type
Persistent Weak Layer
Slab Thickness
30.0 centimeters
Weak Layer Grain type
Near surface faceted particles
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

Small natural avalanches near Cooke City

COOKE CITY
Cooke City
Code
SS-N-R1-D1
Elevation
8700
Latitude
45.02020
Longitude
-109.93800
Notes

photo from IG on 2/6/22

separate obs 26/22: "Small natural soft slab avalanche on a SE aspect at 8737'... Crown was 20cm deep and  approximately 15m wide.I believe it ran on the NSF below the recent storm snow. I think it happened around 10am."

Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Problem Type
New Snow
Slab Thickness
10.0 inches
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year