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

Skiers intentionally triggered a wind-slab avalanche at the cornice near the prayer flags in Bear Basin. Strong winds have drifted snow for the last two days.

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
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

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 of slides
1
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

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 of slides
1
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

Windslab avalanche in bear basin

Date
Activity
Skiing

Went up to the prayer flags today. On the ridge about 100yards below the flags I went to the end of the cornice and gave it a stomp. Triggered a windslab that propagated about 50 to the left. 
HS-ASc- D1-R1-I

The crown was roughly 1-1.5 ft deep in the most wind loaded area. 
Multiple slides have went on this slope already this year, some running a good distance down through the trees. 

Region
Northern Madison
Location (from list)
Bear Basin
Observer Name
Jay Alford