24-25

Pictures of two cornice triggered avalanches way up the South Cottonwood drainage that was viewed from Alex Lowe. Looks to be in the recent days, around 9,000 feet North facing. Photo: S Lipsteuer

Northern Gallatin, 2025-03-01

Wet Loose Avalanche Pioneer Mountain

Other place
Northern Madison
Code
WL-N-R1-D2
Aspect
S
Latitude
45.65530
Longitude
-110.55800
Notes

Natural point release avalanche observed from the YC. Occurred out of bounds on the South side of Pioneer Mountain. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet loose-snow avalanche
Trigger
Natural trigger
R size
1
D size
2
Problem Type
Loose Wet
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Natural Wet Loose Avalanches on solar aspects north of Bridger Bowl

Hourglass Chute
Bridger Range
Code
WL-N-R1-D1
Latitude
45.83320
Longitude
-110.93600
Notes

Observed multiple wet loose slides naturally triggering and running on south facing slopes beyond bradleys and on the south facing aspects of hourglass chute.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet loose-snow avalanche
Trigger
Natural trigger
R size
1
D size
1
Problem Type
Loose Wet
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Cornice Fall Avalanche in Beehive

Beehive Basin
Northern Madison
Code
C-ARc-R1-D2
Elevation
9100
Aspect
E
Latitude
45.30000
Longitude
-111.39900
Notes

Kicked off a wind slab avalanche 25ft wide on the west ridge of beehive basin. The wind slab was around 8-10ft deep and the debris slid almost to the flat a few hundred feet down the slope. The slide occurred around 9100ft on the east aspect. Neither me nor my partner were carried or caught in the slide

 

The windslab that broke off was about 8-10 feet tall. It was mostly a huge section of a cornice that broke and the slope it fell down onto seemed to propagate a few inches down as well. The majority of the debris was from the cornice.

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Cornice fall
Trigger
Snowboarder
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
1
D size
2
Problem Type
Cornice Fall
Slab Width
25.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year