Southern Madison

Remote trigger in little bear

Date
Activity
Snowmobiling

From IG message 4/17/24: "Remote trigger up little bear today. Went to the groundish."

Region
Northern Gallatin
Location (from list)
NORTHERN GALLATIN RANGE
Observer Name
Loren Griswold

Remotely triggered wet slab Taylor Fork

Date
Activity
Snowmobiling

From IG: A group of riders noted very wet snow west of Cabin Creek and Southwest of the Taylor Fork. They were sinking to the ground where it was unconsolidated. The group remotely triggered a wet slab avalanche from the ridge top. There were shooting cracks that connected their location to the avalanche. This is an interesting of persistent weak layer and wet snow avalanche problems. 

Region
Southern Madison
Location (from list)
Taylor Fork
Observer Name
Marcus Harry

Wet Slab Avalanche Above Quake Lake

Quake Lake
Southern Madison
Code
WS-N-R2-D2-G
Latitude
44.85240
Longitude
-111.39200
Notes

From IG: Wet slide to the ground above Quake Lake. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
G - Ground
Problem Type
Wet Snow
Vertical Fall
300ft
Slab Width
150.00ft
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Cornice Collapse on the Sphinx

Sphinx Mountain
Southern Madison
Code
C-ASu
Latitude
45.15820
Longitude
-111.47700
Notes

From obs: " Unintentionally triggered a large cornice collapse on the south face of the Sphinx. " 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Cornice fall
Trigger
Skier
Trigger Modifier
u-An unintentional release
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Cornice Collapse on the Sphinx

Date
Activity
Skiing

Unintentionally triggered a large cornice collapse on the south face of the Sphinx.  I should have expected it, but it was certainly touchier than I was anticipating. Intermittent wind gusts kept upper elevations cooler and we found somewhat cold snow up high. At treeline and below it was hot and crusty! Photos show cornice before and after. 

Region
Southern Madison
Location (from list)
Sphinx Mountain
Observer Name
Haylee Darby