Northern Gallatin
Big avalanche on Mount Bole
Hyalite - main fork
Northern Gallatin
Code
HS-N-R2-D2
Elevation
10200
Aspect
E
Latitude
45.41580
Longitude
-110.99700
Notes
Big scary avalanche on a wind loaded slope on mount Bole.
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Problem Type
Wind-Drifted Snow
Slab Thickness
24.0 inches
Vertical Fall
800ft
Slab Width
200.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Large avalanche on Mt. Bole seen by skiers on 3/17/23.
Avalanche Details: Big avalanche on Mount Bole
Forecast link: GNFAC Avalanche Forecast for Sun Mar 19, 2023
Northern Gallatin, 2023-03-18
Forecast link: GNFAC Avalanche Forecast for Sun Mar 19, 2023
Big avalanche on Mount Bole
Date
Activity
Skiing
Big scary avalanche on a wind loaded slope on mount Bole.
Region
Northern Gallatin
Location (from list)
Hyalite - main fork
Observer Name
Kaleb
We skied the ridge north of Blackmore (Tomahawk Ridge?) traveling between 6800' -9200' on SE-NE aspects.
On the ridge above, ~9400' on a NE aspect there was a natural avalanche, maybe cornice failure, probably same timeframe as the Divide slides. ran ~600'.
HS-N-D2-R2-O
Photo: R. Griffiths
Avalanche Details: Divide & Blackmore slides
Forecast link: GNFAC Avalanche Forecast for Sat Mar 11, 2023
Northern Gallatin, 2023-03-10
Forecast link: GNFAC Avalanche Forecast for Sat Mar 11, 2023
Natural Avalanche Near Blackmore
Date
Activity
Skiing
We skied the ridge north of Blackmore (Tomahawk Ridge?) traveling between 6800' -9200' on SE-NE aspects. We dug two pits. one at 8000' on a NE aspect, HS 170cm fair structure, good strength. ECTN24 @ 45cm below the surface. With loupe and card I could find a few SH feathers on the failure plain.
Second Pit. 9200', NE, previously loaded. HS 210. ECTN28@ -40cm. similar structure but bed surface was much harder (P) old wind board. Couldn't find any surface hoar but found .5mm NSF on failure plain.
On the ridge above, ~9400' on a NE aspect there was a natural avalanche, maybe cornice failure, probably same timeframe as the Divide slides. ran ~600'.
HS-N-D2-R2-O
Wide spread surface hoar on top this morning. Sun was knocking it down on solar slopes by 11:30. Snow (S1) started at ~12:15
Region
Northern Gallatin
Location (from list)
Mt Blackmore
Divide & Blackmore slides
Divide Cirque
Northern Gallatin
Code
HS-N-R1-D2-O
Elevation
10000
Aspect
N
Latitude
45.39340
Longitude
-110.96900
Notes
Skiers noted two slides in Divide Basin that occurred on high, steep, north facing slopes lTuesday night when the wind picked up.
Another party noted an avalanche near Blackmore: "We skied the ridge north of Blackmore (Tomahawk Ridge?) traveling between 6800' -9200' on SE-NE aspects. On the ridge above, ~9400' on a NE aspect there was a natural avalanche, maybe cornice failure, probably same timeframe as the Divide slides. ran ~600'. HS-N-D2-R2-O"
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Natural trigger
R size
1
D size
2
Bed Surface
O - Old snow
Problem Type
Wind-Drifted Snow
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
I went for a walk up to divide basin today and noticed two slides that occurred on high, steep, north facing slopes last night (Tuesday night) when the wind picked up