23-24

Skier triggered avalanche in Mullet near Big Sky

Lone Lake Cirque
Northern Madison
Code
HS-ASu-R3-D2.5-O
Elevation
10200
Aspect
NW
Latitude
45.27710
Longitude
-111.46400
Notes

From BSSP on 2/17/24: "Midafternoon we received another report of a skier triggered avalanche in the Lone Lake Circe, specifically The Mullet. The reporting party contacted several ski patrollers via cell phone and confirmed that nobody was injured or had taken the full ride. This avalanche failed near the ground on a high elevation NW facing slope with the weight of a single skier with an estimated size of HS-ASu-R3-D2.5-O."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Skier
Trigger Modifier
u-An unintentional release
R size
3
D size
2.5
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
24.0 inches
Vertical Fall
690ft
Slab Width
100.00ft
Images
Debris of avalanche in The Mullet
Crown of avalanche in The Mullet
Snow Observation Source
Skier triggered avalanche in Mullet near Big Sky
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

From BSSP on 2/17/24: "Midafternoon we received another report of a skier triggered avalanche in the Lone Lake Circe, specifically The Mullet. The reporting party contacted several ski patrollers via cell phone and confirmed that nobody was injured or had taken the full ride. This avalanche failed near the ground on a high elevation NW facing slope with the weight of a single skier with an estimated size of HS-ASu-R3-D2.5-O."

Avalanche Details: Skier triggered avalanche in Mullet near Big Sky
Northern Madison, 2024-02-18
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    • From BSSP on 2/17/24: "Midafternoon we received another report of a skier triggered avalanche in the Lone Lake Circe, specifically The Mullet. The reporting party contacted several ski patrollers via cell phone and confirmed that nobody was injured or had taken the full ride. This avalanche failed near the ground on a high elevation NW facing slope with the weight of a single skier with an estimated size of HS-ASu-R3-D2.5-O."

    Avalanche Details: Skier triggered avalanche in Mullet near Big Sky
    Forecast link: GNFAC Avalanche Forecast for Sun Feb 18, 2024
    Northern Madison, 2024-02-18
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    • Skier triggered avalanche in Mullet near Big Sky

    Date
    Activity
    Skiing

    From BSSP on 2/17/24: "Midafternoon we received another report of a skier triggered avalanche in the Lone Lake Circe, specifically The Mullet. The reporting party contacted several ski patrollers via cell phone and confirmed that nobody was injured or had taken the full ride. This avalanche failed near the ground on a high elevation NW facing slope with the weight of a single skier with an estimated size of HS-ASu-R3-D2.5-O."

    Region
    Northern Madison
    Location (from list)
    Lone Lake Cirque
    Observer Name
    BSSP

    Rider Partially buried, Sunlight Basin, Taylor Fork

    Taylor Fork
    Southern Madison
    Code
    AMu-R3-D2-O
    Elevation
    9000
    Aspect
    N
    Latitude
    44.96800
    Longitude
    -111.28700
    Notes

    From obs 2/17/24: "North facing slope partially treelined, not heavily windloaded. Rider triggered, Ran 100yards downhill with large debris through trees, broke 2-3' deep at the crown sliding on near earth facets. 1 rider partially caught, airbag deployed, self-extracted with no injuries."

    Number of slides
    1
    Number caught
    1
    Number buried
    1
    Trigger
    Snowmobile
    Trigger Modifier
    u-An unintentional release
    R size
    3
    D size
    2
    Bed Surface
    O - Old snow
    Problem Type
    Persistent Weak Layer
    Slab Thickness
    30.0 inches
    Vertical Fall
    300ft
    Weak Layer Grain type
    Faceted Crystals
    Snow Observation Source
    Slide above the top of sunlight basinoff main Taylor fork trail
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    23-24

    Natural through thick trees in Tepee

    Tepee Basin
    Southern Madison
    Code
    N-R3-D2
    Aspect
    S
    Latitude
    44.90410
    Longitude
    -111.18500
    Notes

    From FB 02/17/24: "Observed runout debris from a small avalanche on a south facing forested slope in Upper Tepee Basin. Shows avalanches can occur through forested areas."

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Trigger
    Natural trigger
    R size
    3
    D size
    2
    Problem Type
    Persistent Weak Layer
    Images
    Debris from recent slide in Tepee
    Snow Observation Source
    Debris from recent slide through thick trees
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    23-24

    Natural near Buck Ridge

    Buck Ridge
    Northern Gallatin
    Code
    N-R3-D2.5-O
    Elevation
    9800
    Aspect
    NW
    Latitude
    45.17600
    Longitude
    -111.45900
    Notes

    Lots of natural activity up buck ridge. The one photoed looked like it popped off this morning. Most activity we saw seemed to be on northern facing aspects

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Trigger
    Natural trigger
    R size
    3
    D size
    2.5
    Bed Surface
    O - Old snow
    Problem Type
    Persistent Weak Layer
    Slab Thickness
    24.0 inches
    Vertical Fall
    690ft
    Slab Width
    375.00ft
    Images
    Natural avalanche Buck Ridge
    Snow Observation Source
    Natural activity up buck ridge
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    23-24

    Debris from recent slide through thick trees

    Date
    Activity
    Snowmobiling

    From FB 02/17/24: "Observed runout debris from a small avalanche on a south facing forested slope in Upper Tepee Basin. Shows avalanches can occur through forested areas."

    Region
    Southern Madison
    Location (from list)
    Tepee Basin
    Observer Name
    Chris Sexton
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