24-25

Cornice Fall Avalanches in upper South Cottonwood

Alex Lowe Peak
Northern Gallatin
Code
C-N-R1-D1.5
Elevation
9000
Aspect
N
Latitude
45.42720
Longitude
-111.01400
Notes

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.

Also a massive cornice that had cracked and was slowly making its way towards falling down. Cornice was around 50 feet long, and largely overhanging. On the standard ascent of the East Ridge of Alex Lowe, the skin track usually travels below this cornice while ascending to the ridge.

Number of slides
2
Number caught
0
Number buried
0
Avalanche Type
Cornice fall
Trigger
Natural trigger
R size
1
D size
1.5
Problem Type
Cornice Fall
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

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