Northern Gallatin

Natural avalanche on Cedar Mtn.

Cedar Mtn.
Northern Madison
Code
HS-NCu-R2-D3
Aspect
E
Latitude
45.22680
Longitude
-111.51200
Notes

From Big Sky Ski Patrol: "Also saw a large slide on one of the far ridges of Cedar that was not there yesterday and appears to be cornice triggered."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Cornice fall
Trigger Modifier
u-An unintentional release
R size
2
D size
3
Problem Type
Wind-Drifted Snow
Images
Natural avalanche on Cedar Mtn
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
19-20

Natural avalanche in wind-loaded snow near Mt Bole, Hyalite

Hyalite - main fork
Northern Gallatin
Code
SS-N-R2-D2-I
Aspect
SE
Latitude
45.44720
Longitude
-110.96200
Notes

From an observation: "We were up on the ridge off Palace Butte and saw this recent natural released slide. Crown was big in spots. Must have happened sometime over night or in the morning (1/29 or 1/30) perhaps from the recent wind loading. East, southeast facing, on the peak north of MT Bole."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
I - Interface between new and old snow
Problem Type
Wind-Drifted Snow
Images
North of Mt Bole_1
North of Mt Bole_2
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
19-20

From an observation: "We were up on the ridge off Palace Butte and saw this recent natural released slide. Crown was big in spots. Must have happened sometime over night or in the morning (1/29 or 1/30) perhaps from the recent wind loading. East, southeast facing, on the peak north of MT Bole." Photo: A. Schrier

Avalanche Details: Natural avalanche in wind-loaded snow near Mt Bole, Hyalite
Forecast link: GNFAC Avalanche Forecast for Fri Jan 31, 2020GNFAC Avalanche Forecast for Sat Feb 1, 2020GNFAC Avalanche Forecast for Sun Feb 2, 2020
Northern Gallatin, 2020-01-31
Access other image sizes:
  • Very Large 1200px
  • Large 480px
  • Medium 220px
  • Small 150px
  • Original

    • From an observation: "We were up on the ridge off Palace Butte and saw this recent natural released slide. Crown was big in spots. Must have happened sometime over night or in the morning (1/29 or 1/30) perhaps from the recent wind loading. East, southeast facing, on the peak north of MT Bole." Photo: A. Schrier

    Avalanche Details: Natural avalanche in wind-loaded snow near Mt Bole, Hyalite
    Northern Gallatin, 2020-01-31
    Access other image sizes:
  • Very Large 1200px
  • Large 480px
  • Medium 220px
  • Small 150px
  • Original

    • Small Wind Slab on Mt. Blackmore

    Mt Blackmore
    Northern Gallatin
    Code
    SS-AS-R1-D1-I
    Elevation
    9200
    Latitude
    45.44390
    Longitude
    -110.99700
    Notes

    Snow picked up at Mt. Blackmore with calm to light winds. Someone up there before us pulled out a small wind loaded pocket on the face leaving the basin.

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Skier
    R size
    1
    D size
    1
    Bed Surface
    I - Interface between new and old snow
    Slab Thickness
    6.0 inches
    Vertical Fall
    50ft
    Slab Width
    20.00ft
    Images
    Small Wind Slab, Blackmore - 28 Jan 2020
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    19-20

    Ian Hoyer stands in a snowpit in Beehive Basin. Avalanches are getting harder to trigger, but in more shallow areas we are still finding a poor snowpack structure. The stability test scores are climbing higher, but still propagating and we did not ski the adjacent slope. Photo: GNFAC


    Forecast link: GNFAC Avalanche Forecast for Wed Jan 29, 2020GNFAC Avalanche Forecast for Thu Jan 30, 2020
    Northern Madison, 2020-01-28
    Access other image sizes:
  • Very Large 1200px
  • Large 480px
  • Medium 220px
  • Small 150px
  • Original
    • Subscribe to Northern Gallatin