Northern Gallatin

Large Natural Avalanche- Elephant Mountain

Hyalite - main fork
Northern Gallatin
Code
Latitude
45.43600
Longitude
-110.98300
Notes

Climbers in Hyalite saw a large natural avalanche on Elephant Mountain. 12/10 

 

 

 

Number of slides
1
Number caught
0
Number buried
0
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

From obs: "Yesterday 12/10/2023 at 0900, my climbing partner and I observed a clear crown line that extended throughout much of the east/ north east aspect of the bowl on Elephant Mountain. "

 

 

Northern Gallatin, 2023-12-10

Large Natural Avalanche- Elephant Mountain

Date
Activity
Ice Climbing

Yesterday 12/10/2023 at 0900, my climbing partner and I observed a clear crown line extend that extended throughout much of the east/ north east aspect of the bowl on Elephant Mountain. 

My partner and I were both surprised by the depth of the crown. The eastern most point of the crown (photo left) was the deepest. 
 

 

 

Region
Northern Gallatin
Location (from list)
Hyalite - main fork

Collapsing on ice climbs in Hyalite

Date
Activity
Ice Climbing

1 team yesterday (Saturday, not me) climbed Bobo Like and Big Sleep (first 2 pitches of each). They experienced 2x collapses but no other signed of instability.

 

Region
Northern Gallatin
Location (from list)
Flanders Creek

Skier Triggered Avalanche at Bridger Bowl

Date
Activity
Skiing

From email: "Solo skier that released a small pocket of snow at the bottom of Super Couloir - he was not caught and it was just the recent new snow and it didn't run far."

Region
Bridger Range
Location (from list)
Bridger Bowl

Snow shoe in hyalite

Date
Activity
Snowshoeing

I snowshoed from the road to Garto Falls to the open meadow below the east face of Elephant. The snow depth varied significantly along the way, ranging from 2 inches to 18 inches at different points. Definitely some unstable spots where I broke through a crust that was about 3-6 inches above the ground, also some weird sinking in the newer snow from the past few days. Around 8,000 feet, the wind intensified, causing heavy drifting snow. This could be seen on every peak in the area.

Region
Northern Gallatin
Location (from list)
Elephant Mountain

Widespread cracking and collapsing

Multiple locations
Bridger Range
Code
Latitude
45.67910
Longitude
-111.04200
Notes

Cracking and collapsing reported across the advisory area in the Bridger Range, Big Sky area, near West Yellowstone and Island Park, and near Cooke City.

Number of slides
0
Number caught
0
Number buried
0
Problem Type
Persistent Weak Layer
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year

Natural Avalanches in Hyalite

Hyalite - main fork
Northern Gallatin
Code
SS-N-R1-D1-S
Latitude
45.44720
Longitude
-110.96200
Notes

Upon descending climbers saw two recent natural avalanches in the Dribbles Gully. These avalanches were failing within the new snow. 

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
1
D size
1
Bed Surface
S - Avalanche released within new snow
Slab Thickness
15.0 centimeters
Vertical Fall
150ft
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year