24-25
New snow avalanche in Hyalite east fork
Hyalite - East Fork
Northern Gallatin
Code
SS-R1-D1-S
Aspect Range
E-NE
Notes
from @brendan_durrum_photo
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
R size
1
D size
1
Bed Surface
S - Avalanche released within new snow
Problem Type
New Snow
Slab Thickness
6.0 inches
Vertical Fall
30ft
Slab Width
50.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Photo: B Durrum
Avalanche Details: New snow avalanche in Hyalite east fork
Forecast link: GNFAC Avalanche Forecast for Mon Dec 16, 2024
Northern Gallatin, 2024-12-15
Forecast link: GNFAC Avalanche Forecast for Mon Dec 16, 2024
Skier triggered slide at The Throne
The Throne
Bridger Range
Code
SS-ASu-R3-D2-S
Aspect
NE
Latitude
45.88220
Longitude
-110.95200
Notes
From IG: "Storm slab broke about 200’ above us as skinning up the hallway coming from the north side on the throne."
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
u-An unintentional release
R size
3
D size
2
Bed Surface
S - Avalanche released within new snow
Problem Type
Storm Slab
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
ECT / CT - Northern Gallatin
Date
Activity
Snowmobiling
On our first column test was CTX and slid on the saw cut, in the video we didn’t get the same result but still very reactive.
During our extended column test we were at 9500ft on a North slope.
ECTN second tap storm slab
ECTN twenty three on ground facets
Region
Northern Gallatin
Location (from list)
Portal Creek
Observer Name
Parkin Costain
Photo: E Heiman
Forecast link: GNFAC Avalanche Forecast for Mon Dec 16, 2024
New snow avalanche in Hyalite east fork
Date
Activity
Ice Climbing
from @brendan_durrum_photo
Region
Northern Gallatin
Location (from list)
Hyalite - East Fork
Observer Name
Brendan Durrum
Slide South of Henderson Bench
Henderson Mountain
Cooke City
Code
SS-ASr-R3-D2-I
Elevation
8900
Latitude
45.04330
Longitude
-109.91800
Notes
Sunday morning 12/15 we were skiing just Southwest of Henderson Mountain between the road cuts. The first skier in our party remotely triggered this slide from a slightly lower angle aspect about 50 ft to the skiers left of the slide where the snowpack was shallower. It broke on a convex rollover about 100 ft wide and ran about 80 ft. downslope. The crown averaged 30 inches and broke on sugary facets about 18 inches from the ground. No one was caught.
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
3
D size
2
Bed Surface
I - Interface between new and old snow
Problem Type
Persistent Weak Layer
Slab Thickness
30.0 inches
Vertical Fall
80ft
Slab Width
100.00ft
Weak Layer Grain type
Solid faceted particles
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
It broke on a convex rollover about 100 ft wide and ran about 80 ft. downslope. The crown averaged 30 inches and broke on sugary facets about 18 inches from the ground. Photo: Anonymous
Avalanche Details: Slide South of Henderson Bench
Forecast link: GNFAC Avalanche Forecast for Mon Dec 16, 2024
Cooke City, 2024-12-15
Forecast link: GNFAC Avalanche Forecast for Mon Dec 16, 2024
It broke on a convex rollover about 100 ft wide and ran about 80 ft. downslope. The crown averaged 30 inches and broke on sugary facets about 18 inches from the ground. Photo: Anonymous
Avalanche Details: Slide South of Henderson Bench
Forecast link: GNFAC Avalanche Forecast for Tue Dec 17, 2024
Cooke City, 2024-12-15
Forecast link: GNFAC Avalanche Forecast for Tue Dec 17, 2024