19-20
Remote triggered 6' deep in Tobacco Root Mtns
Out of Advisory Area
Code
HS-ASr-R3-D2.5-O
Aspect
N
Notes
Party of three skiers remote triggered avalanche with at least 6' crown off N face of Mt Porphry along rockband near summit. They had dug three pits dug on NE face ascending Mt Porphry indicating increasing stability and no clean propagation. Approx 150-210 cm deep snowpack. See attached photo.
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
3
D size
2.5
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
A party of three skiers remote triggered avalanche with at least 6' crown off N face of Mt Porphry along rockband near summit on 12/29/19. They triggered it after tyhey had found "Three pits dug on NE face ascending Mt Porphry indicating increasing stability and no clean propagation. Approx 150-210 cm deep snowpack." Photo: G. Alsentzer
Avalanche Details: Remote triggered 6' deep in Tobacco Root Mtns
Forecast link: GNFAC Avalanche Forecast for Sat Jan 4, 2020GNFAC Avalanche Forecast for Sun Jan 5, 2020
Out of Advisory Area, 2020-01-03
Forecast link: GNFAC Avalanche Forecast for Sat Jan 4, 2020GNFAC Avalanche Forecast for Sun Jan 5, 2020
Avalanche in Beehive
Beehive Basin
Northern Madison
Code
SS-R3-D2-O
Elevation
8600
Aspect
SW
Latitude
45.34070
Longitude
-111.39100
Notes
From e-mail: "Toured in Beehive today. Good snow but very windy. Pics show a large avalanche in the area where “Going Home” ends. Lighting was difficult so not that clear. There was a smaller slide just to the right of the picture and one chute from the end of “Going Home”.
The slide pictures took out some small trees. I was surprised how far into the low angle the debris ran.
Hard to know if this was skier triggered but there were one set of tracks coming down Going Home." Photo: A. Crawford
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
R size
3
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
From e-mail: "Toured in Beehive today. Good snow but very windy. Pics show a large avalanche in the area where “Going Home” ends. Lighting was difficult so not that clear. There was a smaller slide just to the right of the picture and one chute from the end of “Going Home”.
The slide pictures took out some small trees. I was surprised how far into the low angle the debris ran.
Hard to know if this was skier triggered but there were one set of tracks coming down Going Home." Photo: A. Crawford
Avalanche Details: Avalanche in Beehive
Northern Madison, 2020-01-03
From e-mail: "Toured in Beehive today. Good snow but very windy. Pics show a large avalanche in the area where “Going Home” ends. Lighting was difficult so not that clear. There was a smaller slide just to the right of the picture and one chute from the end of “Going Home”.
The slide pictures took out some small trees. I was surprised how far into the low angle the debris ran.
Hard to know if this was skier triggered but there were one set of tracks coming down Going Home." Photo: A. Crawford
Avalanche Details: Avalanche in Beehive
Northern Madison, 2020-01-03
Natural slides and collapsing in Bridger Range
BRIDGER RANGE
Bridger Range
Code
SS
Latitude
45.85120
Longitude
-110.94800
Notes
Skiers saw a recent natural avalanche near Fairy Lake on 1/3/20.
Ski patrol saw recent natural avalanche debris in Truman Gulch behind Bridger Bowl on 1/3/20.
These slides may have happened early morning on 1/3/20 or late 1/2/20.
Skiers had widespread collapsing and a a few "whumphs" of the snowpack at The Throne.
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Problem Type
Persistent Weak Layer
Attached Videos
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year
Large Natural on Saddle Peak
Saddle Peak
Bridger Range
Code
N-R3-D2.5-O
Elevation
9000
Aspect
E
Latitude
45.79430
Longitude
-110.93600
Notes
Seen from the road Friday morning (1/3). Likely ran within last 12-24 hrs.
Number caught
0
Number buried
0
Trigger
Natural trigger
R size
3
D size
2.5
Bed Surface
O - Old snow
Problem Type
Wind-Drifted Snow
Slab Thickness
36.0 inches
Vertical Fall
1200ft
Slab Width
350.00ft
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
We saw this avalanche crown on our drive up Bridger Canyon on Friday (1/3). It looks at least 3' deep and broke near the ridge on a heavily wind loaded slope. Photo: GNFAC
Avalanche Details: Large Natural on Saddle Peak
Bridger Range, 2020-01-03