18-19
This avalanche failed on the ground up on Buck Ridge near the First Yellowmule. It was human-triggered, but nobody was caught or buried. Photo: N. James
This avalanche failed on the ground up on Buck Ridge near the First Yellowmule. It was human-triggered, but nobody was caught or buried. Photo: N. James
Skiers reported triggering soft wind slabs in Hyalite on NE aspect at 9000'. Photo: T. Chingas
Avalanche Details: Skier-triggered soft slabs in Hyalite
Forecast link: GNFAC Avalanche Forecast for Mon Feb 18, 2019
Northern Gallatin, 2019-02-17
Forecast link: GNFAC Avalanche Forecast for Mon Feb 18, 2019
Natural Avalanche near Cooke City
COOKE CITY
Cooke City
Code
N-R2-D2-I
Elevation
9400
Aspect
SE
Notes
Number caught
0
Number buried
0
Number killed
0
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
36.0 inches
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Skier-Triggered Avalanches at the Throne
The Throne
Bridger Range
Code
SS-ASc-R2-D2.5-I
Elevation
8400
Aspect Range
E-SE
Latitude
45.88210
Longitude
-110.95200
Notes
Skiers reported intentionally triggering multiple avalanches failing up to a foot deep at the Throne. From the email: "We dug a pit above the top of the throne (ENE aspect, 8400’, 28°) and got an ECTP17. The pit broke below 55cm of new snow, on top of an old wind slab. Bailed on our objective (the ruler) and skied the main ESE chutes on the throne. Ski cut the top of all 3 chutes and got them all to break out 8-12” deep, 100-200’ wide and they all ran 500-700’ into the trees at the bottom of the gullies. The runout hit the trees at the bottom with enough force to snap 3” trees and piled up debris up to 5’ deep." Photo: M. Cohen
Multiple Avalanches
Number caught
0
Number buried
0
Number killed
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
2
D size
2.5
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
10.0 centimeters
Vertical Fall
600ft
Slab Width
150.00ft
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
Snowmobile triggered Avalanche near Buck Ridge
McAtee Basin
Southern Madison
Code
HS-AMu-R2-D2-O
Elevation
9600
Aspect
NE
Latitude
45.17310
Longitude
-111.44500
Notes
Snowmobile - triggered avalanche in the McAtee Basin area near Buck Ridge. The avalanche was triggered unintentionally from the runout zone and propagated all the way up to the ridge above the riders. Luckily, nobody was caught or buried. Photo: J. Stoner
Number caught
0
Number buried
0
Number killed
0
Avalanche Type
Hard slab avalanche
Trigger
Snowmobile
Trigger Modifier
u-An unintentional release
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
60.0 inches
Vertical Fall
250ft
Slab Width
75.00ft
Images
Attached Videos
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Snowmobile - triggered avalanche in the McAtee Basin area near Buck Ridge. The avalanche was triggered unintentionally from the runout zone and propagated all the way up to the ridge above the riders. Luckily, nobody was caught or buried. Photo: J. Stoner
Snowmobile - triggered avalanche in the McAtee Basin area near Buck Ridge. The avalanche was triggered unintentionally from the runout zone and propagated all the way up to the ridge above the riders. Luckily, nobody was caught or buried. Photo: J. Stoner
Avalanche Details: Snowmobile triggered Avalanche near Buck Ridge
Forecast link: GNFAC Avalanche Forecast for Mon Feb 25, 2019
Northern Madison, 2019-02-17
Forecast link: GNFAC Avalanche Forecast for Mon Feb 25, 2019
This avalanche occurred in the trees on Ernie Miller ridge. Photo: F. Madsen
Avalanche Details: Naturals on Ernie Miller
Southern Madison, 2019-02-17