A rider on 02/18/2024 saw a recent avalanche that was likely remotely triggered by a snowmobiler the day before on 02/17/2024.
Avalanche Details: Rider Triggered Avalanche, Crown Butte
Cooke City, 2024-02-20
23-24
Natural Avalanche in Argentina bowl
Argentina Bowl
Bridger Range
Code
HS-N-R1-D2-O
Elevation
8500
Aspect
NE
Latitude
45.78690
Longitude
-110.93500
Notes
Skiers saw a recent avalanche in Argentina Bowl on 2/20. This avalanche probably happened in the last 48-72 hours.
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Natural trigger
R size
1
D size
2
Bed Surface
O - Old snow
Problem Type
Persistent Weak Layer
Slab Thickness
24.0 inches
Vertical Fall
500ft
Slab Width
100.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Skiers on 02/20/2024 saw a recent natural avalanche in Argentina Bowl. Photo: Anonymous
Avalanche Details: Natural Avalanche in Argentina bowl
Forecast link: GNFAC Avalanche Forecast for Wed Feb 21, 2024
Bridger Range, 2024-02-20
Forecast link: GNFAC Avalanche Forecast for Wed Feb 21, 2024
Natural Avalanche on Bridger Peak
Bridger Peak
Bridger Range
Code
N-R3-D2.5-O
Elevation
8500
Aspect
NE
Latitude
45.77000
Longitude
-110.93900
Notes
From obs 2/20/24: "On the drive up Bridger canyon this morning we noticed an avalanche on an east-northeast facing slope at the ridge near Bridger peak that was not previously noted or reported. Likely natural, possibly happened overnight or yesterday, but maybe earlier and went unnoticed? It looked 1-2’ deep with rocks showing through parts of the bed surface.... Debris did not appear to make it all the way down the chute to flatter runout. But, light was not great and all dimensions were difficult to confirm."
On 2/21 we drove up to look at the slide through binoculars. The slide broke full width of the starting zone and obviously ran to the bottom of the path, although the debris was not visible. Measured on gps, the slide is 300-450' wide
Slide was noticed by a member of BBSP on Monday 2/19, and likely happened on 2/18 or late 2/17.
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
18.0 inches
Vertical Fall
1800ft
Slab Width
350.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Large Collapse Above Wyoming Creek, Cooke City
Wyoming Creek
Cooke City
Code
Aspect
W
Latitude
44.98370
Longitude
-109.95800
Notes
From obs: "My ski partner triggered a big collapse/woomph from the our skin track, heading up from WY Creek back toward Republic Creek on an W facing slope. It was the second time we worked over this skin track, and it propagated to where I was at least, about 30 yards above them. I felt/heard the collapse 1/2 to 1 second after they triggered it."
Number caught
0
Number buried
0
Problem Type
Persistent Weak Layer
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year
Good test scores in Bradley Meadow
Date
Activity
Snowboarding
NW aspect, 13 degree slope, 7850 ft elev.
Total snow depth of 120cm
ECT X
Shovel Sheer (Hard) at 74cm
Region
Bridger Range
Location (from list)
Bradley Meadow
Observer Name
Noah Daily
Large Collapse Above Wyoming Creek
Date
Activity
Skiing
My ski partner triggered a big collapse/woomph from the our skin track, heading up from WY Creek back toward Republic Creek on an W facing slope. It was the second time we worked over this skin track, and it propagated to where I was at least, about 30 yards above them. I felt/heard the collapse 1/2 to 1 second after they triggered it.
It was snowing most of the afternoon in WY Creek with moderate winds with strong gusts at the ridgline coming out of the Southwest.
Region
Cooke City
Location (from list)
Wyoming Creek
Observer Name
B Daley
Natural avalanche on Bridger Peak
Date
On the drive up Bridger canyon this morning we noticed an avalanche on an east-northeast facing slope at the ridge near Bridger peak that was not previously noted or reported. Likely natural, possibly happened overnight or yesterday, but maybe earlier and went unnoticed? It looked 1-2’ deep with rocks showing through parts of the bed surface. 200-250’ wide. Debris did not appear to make it all the way down the chute to flatter runout. But, light was not great and all dimensions were difficult to confirm.
Region
Bridger Range
Location (from list)
Bridger Peak
Observer Name
Alex Marienthal
Bacon Rind Skillet Avalanched
Bacon Rind
Southern Madison
Code
R2-D1.5
Elevation
8900
Aspect
NE
Latitude
44.96090
Longitude
-111.10000
Notes
From obs on 2/20: "The skillet slid sometime recently. Based on the snow on top I'm guessing Thursday-Friday last week (Feb 15-16th), but it could have happened up to a week earlier. Broke ~2 ft deep, 150 ft wide, and it was hard to tell how far it ran, but I'm estimating 200 vertical feet."
Number caught
0
Number buried
0
R size
2
D size
1.5
Slab Thickness
24.0 inches
Vertical Fall
200ft
Slab Width
150.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
The skillet slid sometime recently. Based on the snow on top I'm guessing Thursday-Friday last week (Feb 15-16th), but it could have happened up to a week earlier. Broke ~2 ft deep, 150 ft wide, and it was hard to tell how far it ran, but I'm estimating 200 vertical feet. Photo: GNFAC
Avalanche Details: Bacon Rind Skillet Avalanched
Forecast link: GNFAC Avalanche Forecast for Thu Feb 22, 2024
Southern Madison, 2024-02-20
Forecast link: GNFAC Avalanche Forecast for Thu Feb 22, 2024