20-21

Skier remotely triggered avalanche in N. Madisons

Northern Madison
Code
SS-ASr-R3-D2
Aspect Range
S-E
Latitude
45.26150
Longitude
-111.31500
Notes

"Shallow snowpack 24-36” from 6800-9200 ft S and E aspect. Facets on the ground 6-12” deep. Widespread collapsing and cracks all the way on low angle terrain to the top. Big shooting crack across the south facing path from the skin track so expected the east bowl to remotely trigger and it did from 25m away on the ridge. R3D2 slide. Confirms all previous regional reports and the concerns of the day, typical in this specific area early season. Obsessive terrain management is the only way just now."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
r-A remote avalanche released by the indicated trigger
R size
3
D size
2
Images
Skier remotely triggered avalanche in N. Madisons
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
20-21

"Big shooting crack across the south facing path from the skin track so expected the east bowl to remotely trigger and it did from 25m away on the ridge. R3D2 slide. Confirms all previous regional reports and the concerns of the day, typical in this specific area early season. Obsessive terrain management is the only way just now." Photo: Anon

Avalanche Details: Skier remotely triggered avalanche in N. Madisons
Forecast link: GNFAC Avalanche Forecast for Thu Jan 7, 2021
Northern Madison, 2021-01-06
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    • Small natural avalanche on Buck Ridge

    Buck Ridge
    Northern Madison
    Code
    SS-N
    Elevation
    8000
    Latitude
    45.17190
    Longitude
    -111.38000
    Notes
    "... a small natural slide in the trees on a steep slope at 8,000 feet. The snow broke down to the sugary ground layer with the added weight of yesterday’s storm. The location is just under Buck Ridge, between Second Yellow Mule & Third Yellow Mule drainages."
     
    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Natural trigger
    Images
    Natural avalanche on Buck Ridge
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    20-21

    Skier triggered avalanche in Bradley's Meadow

    Bradley Meadow
    Bridger Range
    Code
    SS-AS-R1-D1.5
    Elevation
    8000
    Aspect
    S
    Latitude
    45.83220
    Longitude
    -110.92800
    Notes

    I was skiing down the apron at Bridger and noticed this slide on Bradley's that appeared to be skier triggered. Picture's were taken at about 2pm. I don't believe this activity was there when I came down the apron earlier in the day around 11:45. I talked to patrol about it and they had not heard anything about it at the time. It appeared both tracks going in, came out. Thanks for all the work you guys do!

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Skier
    R size
    1
    D size
    1.5
    Problem Type
    Persistent Weak Layer
    Images
    Skier triggered slide in Bradley's Meadow
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    20-21

    "...a small natural slide in the trees on a steep slope at 8,000 feet. The snow broke down to the sugary ground layer with the added weight of yesterday’s storm.    The location is just under Buck Ridge, between Second Yellow Mule & Third Yellow Mule drainages." Photo B. Ciccotti  
    Avalanche Details: Small natural avalanche on Buck Ridge
    Northern Madison, 2021-01-06
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    • Many natural avalanches seen in backcountry around Big Sky

    Northern Madison
    Code
    SS-N
    Notes

    "The BC is showing signs of instability all around us-large slides were observed in Lone Lake (basal crust), northerly exposure, out on Cedar in Dirty Bowl, northerly exposure,which slid to ground, and in Beehive Basin."

    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Natural trigger
    Images
    Natural avalanche on Cedar Mtn
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    20-21

    Cracking and small natural slides in S. Gallatin

    SOUTHERN GALLATIN RANGE
    Southern Gallatin
    Code
    Aspect
    W
    Latitude
    45.04320
    Longitude
    -110.96200
    Notes

    "...the snowpack was talkative today. Tons of energetic rolling collapses that shook snow out of the trees 50 feet away, and shot powder up around aspens in a Colorado-esque way. Shooting cracks on low-angle test slopes, and isolated small natural slides on steeper, W-facing terrain."

    Number caught
    0
    Number buried
    0
    Problem Type
    Persistent Weak Layer
    Images
    Cracking in the snowpack
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    20-21

    "...the snowpack was talkative today. Tons of energetic rolling collapses that shook snow out of the trees 50 feet away, and shot powder up around aspens in a Colorado-esque way. Shooting cracks on low-angle test slopes, and isolated small natural slides on steeper, W-facing terrain." Photo: D. Pogge

    Avalanche Details: Cracking and small natural slides in S. Gallatin
    Southern Gallatin, 2021-01-06
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    • Bradley's Meadow

    Date
    Activity
    Skiing

    I was skiing down the apron at Bridger and noticed this slide on Bradley's that appeared to be skier triggered. Picture's were taken at about 2pm. I don't believe this activity was there when I came down the apron earlier in the day around 11:45. I talked to patrol about it and they had not heard anything about it at the time. It appeared both tracks going in, came out.

    Thanks for all the work you guys do!

    Region
    Bridger Range
    Location (from list)
    Bradley Meadow
    Observer Name
    Brian O'Donoghue
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