20-21

Whumphs in Beehive

Beehive Basin
Northern Madison
Code
Latitude
45.34070
Longitude
-111.39100
Notes

Skiers in Beehive Basin triggered multiple whumphs with associated shooting cracks at 8800'-8900' on an east aspect

Number of slides
0
Number caught
0
Number buried
0
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year
20-21

Monster Whumphs at Bacon Rind

Bacon Rind
Southern Madison
Code
Latitude
44.96090
Longitude
-111.10000
Notes

Skiers at Bacon Rind triggered 20+ "Monster Whumphs." They were quickly convinced to stay out of avalanche terrain by these red flags. 

Number of slides
0
Number caught
0
Number buried
0
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year
20-21

Numerous Whumphs in the Taylor Fork

Taylor Fork
Southern Madison
Code
Latitude
45.06070
Longitude
-111.27200
Notes

Touring through low angle meadow we triggered collapses ("whumphs") numbering in the dozens. Some had associated cracking extending about 20' from the point of initiation. 

Number of slides
0
Number caught
0
Number buried
0
Images
Shooting Cracks in the Taylor Fork
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year
20-21

Loose Snow Avalanche - Flanders

Flanders Creek
Northern Gallatin
Code
L-N-R1-D1
Latitude
45.44020
Longitude
-110.93100
Notes

A skier in the Flanders drainage observed a small loose snow avalanche. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
Trigger
Natural trigger
R size
1
D size
1
Images
Natural Avalanche Flanders
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
20-21

From obs: "I did not observe any recent natural activity from the top of Flanders, save for one small slide that started right at a ridgeline. I did not experience any collapsing or cracking, although thinner snow near trees or rocks was weak and unsupportable."

Avalanche Details: Loose Snow Avalanche - Flanders
Forecast link: GNFAC Avalanche Forecast for Tue Dec 29, 2020
Northern Gallatin, 2020-12-28
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    • Skier Triggered Avalanche Mount Blackmore - East Face

    Mt Blackmore
    Northern Gallatin
    Code
    SS-ASu-R1-D1-O
    Elevation
    9500
    Aspect
    E
    Latitude
    45.44460
    Longitude
    -111.00000
    Notes

    From obs: "Skier Triggered a 1.5' slide to his right while making a turn near a cliff band. The slide did not intersect with the skier's path. We did a ECT before choosing our line and were not able to get the soft slab, or anything else to propagate, but clearly, the slab is ready to go as it slid on rocks. We both skied out without incident."

    Number of slides
    1
    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
    Bed Surface
    O - Old snow
    Problem Type
    Persistent Weak Layer
    Images
    Skier Triggered Avalanche Mt Blackmore 2
    Skier Triggered Avalanche Mt Blackmore
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    20-21

    From obs: "Skier triggered a 1.5' slide to his right while making a turn near a cliff band. The slide did not intersect with the skier's path. We did a ECT before choosing our line and were not able to get the soft slab, or anything else to propagate, but clearly, the slab is ready to go as it slid on rocks. We both skied out without incident."

    Avalanche Details: Skier Triggered Avalanche Mount Blackmore - East Face
    Northern Gallatin, 2020-12-28
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    • From obs: "Skier Triggered a 1.5' slide to his right while making a turn near a cliff band. The slide did not intersect with the skier's path. We did a ECT before choosing our line and were not able to get the soft slab, or anything else to propagate, but clearly, the slab is ready to go as it slid on rocks. We both skied out without incident."

    Avalanche Details: Skier Triggered Avalanche Mount Blackmore - East Face
    Forecast link: GNFAC Avalanche Forecast for Tue Dec 29, 2020
    Northern Gallatin, 2020-12-28
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    • Specimen Creek Natural Avalanche

    Specimen Creek
    Southern Gallatin
    Code
    SS-N-R1
    Latitude
    45.02650
    Longitude
    -111.04800
    Notes

    From email: "Went for a tour today on specimen ridge in yellowstone park. Stuck to terrain well below 30 degrees. Widespread whumphs throughout tour. Cracking and collapsing snowpack on small convexities. Observed multiple small avalanches on windloaded slopes. I believe they were triggered remotely by game."

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Natural trigger
    R size
    1
    Images
    Wind slab Specimen Creek
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    20-21
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