23-24

Multiple remote triggers, Lionhead

Lionhead Range
Code
Latitude
44.70170
Longitude
-111.36000
Notes

Multiple remotely triggered avalanches. Lots of shooting cracks and visible whomping(poofs of snow dust). 

Triggered from over 140 yards 

Number of slides
1
Number caught
0
Number buried
0
Snow Observation Source
Multiple remote triggers
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

Good size slide on test slope beehive basin

Date
Activity
Snowboarding

Triggered a good size slide intentionally on a test slope in bhive, about 5 ft below the summer trail. I’m currently doing a pro level 1 course with AAI, my instructor told me to go jump around above the rollover. The slab initiated almost with a slight delay after my 3rd and closest jump toward the rollover, I started to mumble “well not today” and boom it went. 

total snow depth:69cm 

SS-AR-D1.5-R3 intentionally triggered 

aspect:sw

elevation:8250
 

I went back after class and did an ect and ct test directly above the crown, where the top of the crown was 24 degrees :

Ectp20 @44cm down

ectp11@44cm down

ct21 @60cm down

 

Region
Northern Madison
Location (from list)
Beehive Basin

Multiple remote triggers

Date
Activity
Snowmobiling

Multiple remotely triggered avalanches. Lots of shooting cracks and visible whomping(poofs of snow dust). 

Triggered from over 140 yards 

Region
Lionhead Range
Observer Name
Ryli schlueter

Test Slope Avalanche, Beehive Basin

Beehive Basin
Northern Madison
Code
SS-ASc-R3-D1.5
Elevation
8000
Aspect
W
Latitude
45.34070
Longitude
-111.39100
Notes

From email: "AAI Pro 1 course to Beehive Basin. One of the students stomped on a lower angle slope directly above a large test slope. On the second stomp the slope released. West aspect at about 8000'. SS-ASc-R3-D1.5-O. Some localized cr, co while breaking trail."

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Skier
Trigger Modifier
c-A controlled or intentional release by the indicated trigger
R size
3
D size
1.5
Problem Type
Persistent Weak Layer
Images
Crown of test slope avalanche, Beehive Basin 01/23
Beehive Basin Test Slope Avalanche 2
Beehive Basin Test Slope Avalanche 1
Snow Observation Source
Beehive Basin Observations
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
23-24

From email: "AAI Pro 1 course to Beehive Basin. One of the students stomped on a lower angle slope directly above a large test slope. On the second stomp the slope released. West aspect at about 8000'. SS-ASc-R3-D1.5-O" Photo: N. Hance

Avalanche Details: Test Slope Avalanche, Beehive Basin
Forecast link: GNFAC Avalanche Forecast for Thu Jan 25, 2024
Northern Madison, 2024-01-23
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    • From email: "AAI Pro 1 course to Beehive Basin. One of the students stomped on a lower angle slope directly above a large test slope. On the second stomp the slope released. West aspect at about 8000'. SS-ASc-R3-D1.5-O" Photo: N. Hance

     

    Avalanche Details: Test Slope Avalanche, Beehive Basin
    Forecast link: GNFAC Avalanche Forecast for Wed Jan 24, 2024
    Northern Madison, 2024-01-23
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    • Beehive Basin Observations

    Date
    Activity
    Skiing

    From email: "AAI Pro 1 course to Beehive Basin. One of the students stomped on a lower angle slope directly above a large test slope. On the second stomp the slope released. West aspect at about 8000'. SS-ASc-R3-D1.5-O

    18 pits were dug by students and all had ECTP results scoring 15 or lower, and most scoring less than 10, failing on small facets down 20-40cm. PST 22/100 end and 40/100 end. Rutschblock RB3. HS 60-80cm, E and W aspects at about 8500'. Surprisingly, we didn't find SH in any of our pits. Some localized cr, co while breaking trail."

    Region
    Northern Madison
    Location (from list)
    Beehive Basin
    Observer Name
    Nina Hance

    Cracking and Collapsing in Black Canyon, Island Park

    Other place
    Island Park
    Code
    Latitude
    44.47670
    Longitude
    -111139000.00000
    Notes

    From obs: "Collapsing snow could be felt underneath my sled all day up Black Canyon Loop trail, east of Island Park. There was a moment where shooting cracks spread from my ski tips to about 10 yards away on flat ground. The canyon just north my location was probably steep enough to slide."

    Number of slides
    0
    Number caught
    0
    Number buried
    0
    Snow Observation Source
    Serious signs of instability up black canyon
    Slab Thickness units
    centimeters
    Single / Multiple / Red Flag
    Red Flag
    Advisory Year
    23-24

    Serious signs of instability up black canyon

    Date
    Activity
    Snowmobiling

    Collapsing snow could be felt underneath my sled all day up Black Canyon Loop trail, east of Island Park. There was a moment where shooting cracks spread from my ski tips to about 10 yards away on flat ground. The canyon just north my location was probably steep enough to slide.

    Region
    Island Park
    Location (from list)
    Other place
    Observer Name
    Marcus Sirounian
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