Northern Gallatin

Shooting Cracks in Hyalite and Specimen Creek

Specimen Creek
Southern Gallatin
Code
HS
Latitude
45.03790
Longitude
-111.06000
Notes

From obs 2/27/22: "Shooting cracks in a thin wind slab on a ridge crest. The slab was small but the collapse was abrupt and propagated 20 feet."

From a group on Flanders Mtn in Hyalite: "I triggered a shallow 2-3cm deep windslab about 20 feet wide just below the ridgeline. I was not on a steep slope, so it barely moved. "

Number of slides
0
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Images
Cracking wind slab below ridge on Flanders
Shooting Cracks in Specimen Creek 2
Shooting Cracks in Specimen Creek
Small windslab triggered on Flanders
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year
21-22

From obs 2/27/22: "Skied Flanders mountain today. Dug a snowpit on a SE facing 24 deg slope at 9700 feet. ECTN24 30cm down on a layer of facets just under an ice crust. Snow above the ice crust was 4F- at most and not hard enough for anything to propagate. Winds were moderate and gusty, transporting a decent amount of snow but not really forming any slabs other than at the ridgeline. I triggered a shallow 2-3cm deep windslab about 20 feet wide just below the ridgeline. I was not on a steep slope, so it barely moved.... didn't see any other signs of instability." Photo: M. Lavery

Avalanche Details: Shooting Cracks in Hyalite and Specimen Creek
Northern Gallatin, 2022-02-28
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    • Flanders Skiing

    Date
    Activity
    Skiing

    Skied Flanders mountain today. Dug a snowpit on a SE facing 24 deg slope at 9700 feet. ECTN24 30cm down on a layer of facets just under an ice crust. Snow above the ice crust was 4F- at most and not hard enough for anything to propagate. 

    Winds were moderate and gusty, transporting a decent amount of snow but not really forming any slabs other than at the ridgeline. I triggered a shallow 2-3cm deep windslab about 20 feet wide just below the ridgeline. I was not on a steep slope, so it barely moved. Partner and I skied 4 laps in the bowl, skiing was great, didn't see any other signs of instability. 

    Region
    Northern Gallatin
    Location (from list)
    Flanders Creek
    Observer Name
    Mike Lavery

    Massive Overhangs

    Date
    Activity
    Snowbiking

    Massive overhangs above Hidden Lakes but very minimal activity 

    Region
    Northern Gallatin
    Location (from list)
    Portal Creek
    Observer Name
    Glenn Edwards

    Skier triggered wind slab on Mt. Blackmore

    Mt Blackmore
    Northern Gallatin
    Code
    SS-ASu-R1-D1
    Elevation
    9700
    Aspect
    E
    Latitude
    45.44440
    Longitude
    -111.00400
    Notes

    obs. 2/26/22: "This is a slide that was triggered today at Mt. Blackmore. Nobody was hurt...”

    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
    Problem Type
    Wind-Drifted Snow
    Images
    Skier triggered wind slab on Mt. Blackmore
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Single Avalanche
    Advisory Year
    21-22

    Skier triggered wind slab on Mt. Blackmore

    Date
    Activity
    Skiing

    Text to Alex, “Hey Alex, this is Jack Shonka, the MSU undergrad who was doing undergrad research last spring. This is a slide that was triggered today at Mt. Blackmore. Nobody was hurt but pretty wild!”

    Region
    Northern Gallatin
    Location (from list)
    Mt Blackmore
    Observer Name
    Jack Shonka

    From email 2/22/22: "I did a loop around Alex Lowe and Blackmore today...There was a 5-10mph breeze near ridgelines, and other places were dead calm...I noticed a number of small to medium natural sloughs, some of which could have had the power to knock someone over." Photo: S. Reinsel

    Avalanche Details: Loose snow avalanches in Hyalite
    Forecast link: GNFAC Avalanche Forecast for Wed Feb 23, 2022GNFAC Avalanche Forecast for Thu Feb 24, 2022GNFAC Avalanche Forecast for Fri Feb 25, 2022
    Northern Gallatin, 2022-02-23
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    • Loose snow avalanches in Hyalite

    Alex Lowe Peak
    Northern Gallatin
    Code
    L-N-R0-D1-O
    Latitude
    45.42720
    Longitude
    -111.01400
    Notes

    I did a loop around Alex Lowe and Blackmore today...There was a 5-10mph breeze near ridgelines, and other places were dead calm...I noticed a number of small to medium natural sloughs, some of which could have had the power to knock someone over. 

    Number caught
    0
    Number buried
    0
    Avalanche Type
    Loose-snow avalanche
    Trigger
    Natural trigger
    R size
    0
    D size
    1
    Bed Surface
    O - Old snow
    Problem Type
    Loose Dry
    Images
    Loose snow avalanches in Hyalite
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Multiple Avalanches
    Advisory Year
    21-22
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