23-24

Natural Activity NW of Blackmore

Date
Activity
Skiing

White touring in the History Rock area, I spotted a couple of recent slides on the NW shoulder of Mt. Blackmore. From a distance, these look like dry-loose slides on the recent snow interface around 8,500ft. on a N-NE aspect.

Otherwise, 12-20cm of new snow was present in the area (~ HS 80-115cm), with evidence of wind loading on east aspects, and scouring on west aspects. No other signs of instability were observed.

Region
Northern Gallatin
Location (from list)
History Rock

Snowmobile Triggered Avalanche Twin Peaks

Flint Creek Range
Butte Area
Code
HS-AMu-R3-D2.5-O
Aspect
NW
Latitude
46.29020
Longitude
-113.13300
Notes

From obs: "Secondhand photo and story regarding two snowmobilers sidehilling the northwest aspect of Twin Peaks and triggering the slide in the photos.  They were both able to ride out of it.  This avalanche is located about 150 yards north of the Twin Peaks avalanche accident site from January 2024."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Snowmobile
Trigger Modifier
u-An unintentional release
R size
3
D size
2.5
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Images
Twin Peaks Snowmobile triggered avalanche March
Snow Observation Source
Snowmobile triggered avalanche Twin Peaks
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

Natural Avalanche Miller Mtn.

Miller Mtn.
Cooke City
Code
N
Latitude
45.04650
Longitude
-109.97700
Notes

From IG on 3/3/24. Natural on Wolverine and natural between Miller and Sunset. Looked like they went today or yesterday.

Number of slides
1
Number caught
0
Number buried
0
Trigger
Natural trigger
Images
Natural avalanches on Miller Mountain
Snow Observation Source
Natural avalanches near Cooke
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

Natural Avalanche Wolverine Peak

Wolverine Peak
Cooke City
Code
N
Aspect
E
Latitude
45.05300
Longitude
-110.01000
Notes

From IG on 3/3/24. Natural on Wolverine and natural between Miller and Sunset. Looked like they went today or yesterday.

Number of slides
1
Number caught
0
Number buried
0
Trigger
Natural trigger
Images
Natural avalanche on Wolverine Peak
Snow Observation Source
Natural avalanches near Cooke
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

Remotely Triggered Avalanche in Absoroka-Beartooths

Out of Advisory Area
Code
HS-ASr-R3-D2-O
Elevation
9500
Aspect
N
Latitude
45.36900
Longitude
-110.62300
Notes

From obs: "Remotely triggered a large avalanche on a N aspect at 9500 ft while ascending a ridge line [in Mill Creek, Absaroka]. We estimated the slide to be D3 R3. The crown spanned roughly 1400ft +/- and ranged between roughly 1-5ft deep. They appeared to be 2 distinct layers in the crown profile, one of recent ‘storm’ snow and a lower one above old facets. This was observed from a distance. Witnessed large trees being shaken by the slide and smaller ones completely breaking. The bottom of the run out became much more planar indicating the sheer volume of debris that filled in. Extremely powerful to witness such energy and destruction. All persons in the party were in safe terrain with no intention to ski this slope at all. "

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Skier
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
3
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
36.0 inches
Slab Width
1400.00ft
Images
Remotely Triggered Avalanche in Absoroka-Beartooths, 3
Remotely Triggered Avalanche in Absoroka-Beartooths , 2
Remotely Triggered Avalanche in Absoroka-Beartooths, 1
Attached Videos
Remotely triggered avalanche (outside advisory area) - 3 Mar 2024
Snow Observation Source
Remotely Triggered Avalanche in Absaroka-BTooths
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

Skiers remotely triggered this avalanche on 03/03/2024 while ascending a ridge line in Mill Creek. The crown was 1-5' deep and 1400' wide. They watch the avalanche from safe terrain and all members of the party are accounted for.  Photo: Anonymous

Avalanche Details: Remotely Triggered Avalanche in Absoroka-Beartooths
Out of Advisory Area, 2024-03-04
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    • Skiers remotely triggered this avalanche on 03/03/2024 while ascending a ridge line in Mill Creek. The crown was 1-5' deep and 1400' wide. They watch the avalanche from safe terrain and all members of the party are accounted for.  Photo: Anonymous

    Avalanche Details: Remotely Triggered Avalanche in Absoroka-Beartooths
    Out of Advisory Area, 2024-03-04
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  • Small 150px
  • Original

    • Skiers remotely triggered this avalanche on 03/03/2024 while ascending a ridge line in Mill Creek. The crown was 1-5' deep and 1400' wide. They watch the avalanche from safe terrain and all members of the party are accounted for.  Photo: Anonymous 

     

    Avalanche Details: Remotely Triggered Avalanche in Absoroka-Beartooths
    Out of Advisory Area, 2024-03-04
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  • Original

    • Snowmobile triggered avalanche Twin Peaks

    Date
    Activity
    Snowmobiling

    Secondhand photo and story regarding two snowmobilers sidehilling the northwest aspect of Twin Peaks and triggering the slide in the photos.  They were both able to ride out of it.  This avalanche is located about 150 yards north of the Twin Peaks avalanche accident site from January 2024.

    Region
    Butte Area
    Location (from list)
    Flint Creek Range
    Observer Name
    Will Shoutis
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