Northern Gallatin

Ice climber hit by loose snow avalanche on Killer Pillar, Hyalite

Flanders Creek
Northern Gallatin
Code
L-N
Aspect
NE
Latitude
45.44020
Longitude
-110.93100
Notes

From an email:

"Got hit by a pretty decent loose snow avalanche from above while topping out on Killer Piller up Flanders. Had a decent stance so I was able to hold on. Also observed more than a few coming down gullies on the other side of the drainage. It was lightly snowing all day and dead calm in the drainage, so presumably winds were cranking on the ridgetop."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
Trigger
Natural trigger
Problem Type
Wind-Drifted Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
19-20

Skier remotely triggered a small wind slab up Hyalite

Maid of the Mist
Northern Gallatin
Code
SS-ASr-R0-D1-I
Latitude
45.41640
Longitude
-110.97000
Notes

From an email: "Remotely triggered this small wind slab while skinning into the Maid of the Mist basin. Throughout the day I continued to encounter other small, reactive wind slabs and strong winds."

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
0
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
Wind-Drifted Snow
Images
Skier remotely triggered a small wind slab in Hyalite
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
19-20

This small wind slab was remotely triggered while skinning into the Maid of the Mist basin. Throughout the day they continued to encounter other small, reactive wind slabs and strong winds. Small avalanches are a warning sign that larger ones are possible. Photo: Sam Wilson

Avalanche Details: Skier remotely triggered a small wind slab up Hyalite
Forecast link: GNFAC Avalanche Forecast for Wed Jan 1, 2020GNFAC Avalanche Forecast for Fri Jan 3, 2020
Northern Gallatin, 2019-12-31
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    • Human triggered hard wind slab near Fairy Lake

    Fairy Lake
    Bridger Range
    Code
    HS-AU-R4-D2-O
    Latitude
    45.90430
    Longitude
    -110.95800
    Notes

    Riders near Fairy Lake reported this slide on Saturday 12/21. Photo: @turbo_dieshall

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Hard slab avalanche
    Trigger
    Unknown artificial trigger
    R size
    4
    D size
    2
    Bed Surface
    O - Old snow
    Problem Type
    Wind-Drifted Snow
    Slab Thickness
    42.0 inches
    Images
    Rider triggered slide on heavily wind loaded slope
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    19-20

    Snowmobile remote triggered 5' deep wind slab

    NORTHERN GALLATIN RANGE
    Northern Gallatin
    Code
    HS-AMr-R2-D1.5-O
    Latitude
    45.47550
    Longitude
    -110.95000
    Notes

    From IG message: "5' thick wind slab just behind little bear remote triggered riding along the ridge." @skidooin_it

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Hard slab avalanche
    Trigger
    Snowmobile
    Trigger Modifier
    r-A remote avalanche released by the indicated trigger
    R size
    2
    D size
    1.5
    Bed Surface
    O - Old snow
    Problem Type
    Wind-Drifted Snow
    Images
    Snowmobile remote triggered avalanche near Little Bear
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    19-20

    Large Collapse on hard wind slab in Hyalite

    Flanders Creek
    Northern Gallatin
    Code
    HS-AF-O
    Elevation
    7900
    Aspect
    NW
    Latitude
    45.43880
    Longitude
    -110.92600
    Notes

    Ice climbers had a very hard wind slab collapse, crack and "whumph" while approaching a climb in Flander's drainage. Winds were blowing strong and drifting snow. They noted their tracks were filled in when they left, and fresh drifts cracked when isolated.

    Number of slides
    0
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Hard slab avalanche
    Trigger
    Foot penetration
    Bed Surface
    O - Old snow
    Problem Type
    Wind-Drifted Snow
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Red Flag
    Advisory Year
    19-20
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