21-22
Massive Overhangs
Date
Activity
Snowbiking
Massive overhangs above Hidden Lakes but very minimal activity
Region
Northern Gallatin
Location (from list)
Portal Creek
Observer Name
Glenn Edwards
Skier triggered wind slab on Mt. Blackmore
Mt Blackmore
Northern Gallatin
Code
SS-ASu-R1-D1
Elevation
9700
Aspect
E
Latitude
45.44440
Longitude
-111.00400
Notes
obs. 2/26/22: "This is a slide that was triggered today at Mt. Blackmore. Nobody was hurt...”
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
u-An unintentional release
R size
1
D size
1
Problem Type
Wind-Drifted Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
From obs. 2/26/22: "This is a slide that was triggered today at Mt. Blackmore. Nobody was hurt...”
Avalanche Details: Skier triggered wind slab on Mt. Blackmore
Forecast link: GNFAC Avalanche Forecast for Sun Feb 27, 2022
Northern Gallatin, 2022-02-26
Forecast link: GNFAC Avalanche Forecast for Sun Feb 27, 2022
Skier triggered and caught in avalanche N. Bridgers
Northern Bridgers
Bridger Range
Code
HS-ASu-R1-D1.5-O
Elevation
8300
Latitude
45.91960
Longitude
-110.97600
Notes
From email 2/26/22: "Skiing in the Northern Bridgers today, one skier in our party of three triggered an avalanche in October bowl. The slide was approximately 40 yds wide and ran around 150 yds. The skier was carried approximately 100 yds, but was not buried and sustained no injuries. Neither of the other members of our party were in the slide path when it occurred."
Number caught
1
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Skier
Trigger Modifier
u-An unintentional release
R size
1
D size
1.5
Bed Surface
O - Old snow
Problem Type
Wind-Drifted Snow
Slab Thickness
12.0 inches
Vertical Fall
300ft
Slab Width
120.00ft
Images
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
From email 2/26/22: "Skiing in the Northern Bridgers today, one skier in our party of three triggered an avalanche in October bowl. The slide was approximately 40 yds wide and ran around 150 yds. The skier was carried approximately 100 yds, but was not buried and sustained no injuries. Neither of the other members of our party were in the slide path when it occurred... photo shows the slide from the bottom and the approximate path the skier was on when he triggered the slide."
Avalanche Details: Skier triggered and caught in avalanche N. Bridgers
Forecast link: GNFAC Avalanche Forecast for Mon Feb 28, 2022
Bridger Range, 2022-02-26
Forecast link: GNFAC Avalanche Forecast for Mon Feb 28, 2022
From email 2/26/22: "Skiing in the Northern Bridgers today, one skier in our party of three triggered an avalanche in October bowl. The slide was approximately 40 yds wide and ran around 150 yds. The skier was carried approximately 100 yds, but was not buried and sustained no injuries. Neither of the other members of our party were in the slide path when it occurred... This photo shows the distance the skier slid; the photo being taken from approximately where the skier fell."
Avalanche Details: Skier triggered and caught in avalanche N. Bridgers
Forecast link: GNFAC Avalanche Forecast for Sun Feb 27, 2022
Bridger Range, 2022-02-26
Forecast link: GNFAC Avalanche Forecast for Sun Feb 27, 2022
From email 2/26/22: "Skiing in the Northern Bridgers today, one skier in our party of three triggered an avalanche in October bowl. The slide was approximately 40 yds wide and ran around 150 yds. The skier was carried approximately 100 yds, but was not buried and sustained no injuries. Neither of the other members of our party were in the slide path when it occurred."
This photo shows the crown from the location of one of the other skiers.
Avalanche Details: Skier triggered and caught in avalanche N. Bridgers
Bridger Range, 2022-02-26
Skier triggered wind slab on Mt. Blackmore
Date
Activity
Skiing
Text to Alex, “Hey Alex, this is Jack Shonka, the MSU undergrad who was doing undergrad research last spring. This is a slide that was triggered today at Mt. Blackmore. Nobody was hurt but pretty wild!”
Region
Northern Gallatin
Location (from list)
Mt Blackmore
Observer Name
Jack Shonka
Skier remote triggered multiple wide slides in Ainger Basin
Northern Bridgers
Bridger Range
Code
HS-ASr-R2-D2-O
Elevation
8400
Latitude
45.91960
Longitude
-110.97600
Notes
From obs. 2/26/22: "Hey guys wanted to report a few avalanches we set off in the northern bridger range today, while skiing off of Seitz Peak. We skied the couloir (on horrible wind-scoured snow) without incident, then skied out onto the fan. I got a dozen or so turns in when the slope propagated 200’ below me, roughly 400’ wide. I skied off to the side to let it pass and watched it break sympathetically 200’ above my original trigger point, 12-18” thick at the thickest point. Overall 600’ wide, 8-18” thick, and ran over 1000 vertical feet. On our way down out of the bowl both my partner and I were able to break off more slabs through remote triggers, 50-100’ away getting them to break 8-12” deep and 100-200’ wide. All the slides broke on a layer of small grain facets in the new snow/old snow interface. We bailed on our other objectives for the day and skinned back out to the sled. Very touchy out there today!"
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Skier
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
12.0 inches
Vertical Fall
1000ft
Slab Width
600.00ft
Weak Layer Grain type
Faceted Crystals
Images
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year