Weather and Avalanche Log for Mon Feb 26, 2024
AVALANCHE WARNING: Cooke City
23-24
Windslab avalanche in bear basin
Bear Basin
Northern Madison
Code
SS-ASc-R1-D1-I
Aspect
E
Latitude
45.32420
Longitude
-111.38200
Notes
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
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
Wind-Drifted Snow
Slab Thickness
14.0 inches
Vertical Fall
75ft
Slab Width
100.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Skiers intentionally triggered a small avalanche near the prayer flags in Bear Basin. This slope has avalanched previously this season. Photo: J Alford
Avalanche Details: Windslab avalanche in bear basin
Forecast link: GNFAC Avalanche Forecast for Mon Feb 26, 2024
Northern Madison, 2024-02-25
Forecast link: GNFAC Avalanche Forecast for Mon Feb 26, 2024
Wind Slab South of Cooke City
Woody Ridge
Cooke City
Code
HS-AS-R1-D1-I
Elevation
9900
Aspect
W
Latitude
44.97390
Longitude
-109.92400
Notes
From Obs: "Toured up the west side of Woody via Central Park approach. Moderate to high wind gusts at the ridge line. Skied a couple laps in variable conditions on Sub bowl and then returned to the West aspect for a lap down South Central .
Traversed into the tube at tree-line roughly 9900’ and triggered a small wind slab. Crown was around ~1 foot deep and maybe 40 feet wide. Possibly stepped down a bit once in the tube and then ran for about 300 feet.
HS-AS-D1-R1"
Number caught
0
Number buried
0
Avalanche Type
Hard slab avalanche
Trigger
Skier
R size
1
D size
1
Bed Surface
I - Interface between new and old snow
Problem Type
Wind-Drifted Snow
Slab Thickness
12.0 inches
Vertical Fall
300ft
Slab Width
40.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Skiers on West Woody Ridge triggered a wind-slab avalanche that failed 1 foot deep and 40 feet wide. The avalanche ran 300 feet. Photo: N. Dogg
Skiers on West Woody Ridge triggered a wind-slab avalanche that failed 1 foot deep and 40 feet wide. The avalanche ran 300 feet. Photo: N. Dogg
Avalanche Details: Wind Slab South of Cooke City
Cooke City, 2024-02-25
Wind Slab South of Cooke City
Date
Activity
Skiing
Toured up the west side of Woody via Central Park approach. Moderate to high wind gusts at the ridge line. Skied a couple laps in variable conditions on Sub bowl and then returned to the West aspect for a lap down South Central .
Traversed into the tube at tree-line roughly 9900’ and triggered a small wind slab. Crown was around ~1 foot deep and maybe 40 feet wide. Possibly stepped down a bit once in the tube and then ran for about 300 feet.
HS-AS-D1-R1
Region
Cooke City
Location (from list)
Woody Ridge
Observer Name
N. Dogg
Natural slides in McAtee near Buck
Buck Ridge
Northern Madison
Code
N
Elevation
9400
Aspect
NE
Latitude
45.17270
Longitude
-111.44800
Notes
From obs 2/24/24: "Saw multiple large slides around the McAtte drainage N/NE aspects. Some were larger than others but all ran on what looked like a persistent grain or even to the ground in some. Probably natural released over last few days."
Number caught
0
Number buried
0
Trigger
Natural trigger
Problem Type
Persistent Weak Layer
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year