22-23

Sympathetic Release of the Football Field

Saddle Peak
Bridger Range
Code
HS-AE-R3-D3-O
Aspect
E
Latitude
45.79430
Longitude
-110.93600
Notes

From BBSP: "Most of the Football Field pulled with the top Bitter End shot."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
An explosive thrown or placed on or under the snow surface by hand
R size
3
D size
3
Bed Surface
O - Old snow
Problem Type
Wind-Drifted Snow
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
22-23

Avalanches and remote trigger, Lionhead

Lionhead Ridge
Lionhead Range
Code
HS-AMr-R3-D1.5-I
Elevation
8900
Aspect
NE
Latitude
44.72960
Longitude
-111.32000
Notes

As we rode into Lionhead we saw many slides that either ran naturally or from cornice falls (separate avalanche log record). Most of the slides happened Fri or Sat. Winds are blowing strong at all aspects and elevations. Slopes are being loaded further and we triggered a small slide (video) from 50 feet away (aka remotely triggered). This is a serious sign of instability and we were careful to not get on or underneath avalanche terrain.

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
3
D size
1.5
Bed Surface
I - Interface between new and old snow
Problem Type
New Snow
Slab Thickness
18.0 inches
Vertical Fall
10ft
Slab Width
60.00ft
Images
The cornice that triggered the slide.
Cornice triggered avalanche off Lionhead Ridge.
Avalanche triggered remotely from 50 feet away.
Attached Videos
Notch it back, Lionhead - 31 Jan
Snow Observation Source
Avalanches and remote trigger
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
22-23

As we rode into Lionhead we saw many slides that either ran naturally or from cornice falls. Most of the slides happened Fri or Sat. Winds are blowing strong at all aspects and elevations. Slopes are being loaded further and we triggered a small slide (video) from 50 feet away (aka remotely triggered). This is a serious sign of instability and we were careful to not get on or underneath avalanche terrain.

Avalanche Details: Avalanches and remote trigger, LionheadMany large Natural Avalanches at Lionhead
Forecast link: GNFAC Avalanche Forecast for Thu Feb 2, 2023
Lionhead Range, 2023-01-31
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    • As we rode into Lionhead we saw many slides that either ran naturally or from cornice falls. Most of the slides happened Fri or Sat. Winds are blowing strong at all aspects and elevations. Slopes are being loaded further and we triggered a small slide (video) from 50 feet away (aka remotely triggered). This is a serious sign of instability and we were careful to not get on or underneath avalanche terrain.

    Avalanche Details: Avalanches and remote trigger, LionheadMany large Natural Avalanches at Lionhead
    Forecast link: GNFAC Avalanche Forecast for Fri Feb 3, 2023
    Lionhead Range, 2023-01-31
    Access other image sizes:
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  • Large 480px
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  • Small 150px
  • Original

    • As we rode into Lionhead we saw many slides that either ran naturally or from cornice falls. Most of the slides happened Fri or Sat. Winds are blowing strong at all aspects and elevations. Slopes are being loaded further and we triggered a small slide (video) from 50 feet away (aka remotely triggered). This is a serious sign of instability and we were careful to not get on or underneath avalanche terrain.

    Avalanche Details: Avalanches and remote trigger, Lionhead
    Forecast link: GNFAC Avalanche Forecast for Wed Feb 1, 2023GNFAC Avalanche Forecast for Thu Feb 2, 2023
    Lionhead Range, 2023-01-31
    Access other image sizes:
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  • Large 480px
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  • Small 150px
  • Original

    • Avalanches and remote trigger

    Date
    Activity
    Snowmobiling

    As we rode into Lionhead we saw many slides that either ran naturally or from cornice falls. Most of the slides happened Fri or Sat. Winds are blowing strong at all aspects and elevations. Slopes are being loaded further and we triggered a small slide (video) from 50 feet away (aka remotely triggered). This is a serious sign of instability and we were careful to not get on or underneath avalanche terrain.

    Region
    Lionhead Range
    Location (from list)
    Lionhead Ridge
    Observer Name
    Doug Chabot

    Avalanches in Flanders area

    Date
    Activity
    Skiing

    Went skiing up in in Flanders area and saw several avalanches with crowns ranging from 1-3ft deep and running a several hundred yards wide. Also experienced 2 whumpfs and some cracks on a wind loaded aspect near the ridge

    Region
    Northern Gallatin
    Location (from list)
    Flanders Creek
    Observer Name
    Ben Farrell

    Many Natural Avalanches North of Cooke City

    COOKE CITY
    Cooke City
    Code
    SS-N-R2-D2-I
    Aspect Range
    N-NW-W-SW-E
    Latitude
    45.02020
    Longitude
    -109.93800
    Notes

    Riding north of Cooke City on 1/29 and 1/30, we observed many natural avalanches that occurred during last week's storm. Avalanches failed within the storm snow or on weak layers in the upper snowpack, on wind-loaded and non-wind-loaded slopes, and on all aspects. We observed avalanches on Crown Butte, Wolverine, Scotch Bonnet, Sheep Mountain, and near the wilderness boundary at Goose Lake.

    Number of slides
    4
    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
    New Snow
    Slab Thickness
    20.0 inches
    Images
    Natural Avalanche near Goose Lake
    Natural Avalanches Cooke City 5
    Natural Avalanches Cooke City 4
    Natural Avalanche Cooke City 3
    Natural Avalanches Cooke City 2
    Natural Avalanches Cooke City
    Attached Videos
    A Dangerous Probabilities Game in Cooke City - 30 January 2023
    New Snow and Avalanches in Cooke City - 29 January 2023
    Slab Thickness units
    inches
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    22-23

    Cornice Collapse, Beehive

    Bear Basin
    Northern Madison
    Code
    SS-NC-R1-D1-S
    Elevation
    9200
    Aspect
    NE
    Latitude
    45.34530
    Longitude
    -111.37500
    Notes

    Skiers observed a small avalanche triggered by a cornice collapse on an east-facing slope in Bear Basin. 

    Number of slides
    1
    Number caught
    0
    Number buried
    0
    Avalanche Type
    Soft slab avalanche
    Trigger
    Cornice fall
    R size
    1
    D size
    1
    Bed Surface
    S - Avalanche released within new snow
    Problem Type
    Wind-Drifted Snow
    Vertical Fall
    25ft
    Slab Width
    75.00ft
    Images
    Cornice Collapse, Beehive
    Snow Observation Source
    Cornice Collapse, Beehive
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    22-23
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