22-23

Wet slab on Henderson Mtn.

Henderson Mountain
Cooke City
Code
WS-N-R2-D2-O
Elevation
10000
Aspect
NE
Latitude
45.05240
Longitude
-109.94500
Notes

Snowmobilers saw a recent wet slab on the northeast face of Henderson Mtn. on May 20, 2023. Video attached. 

Within last 4 days (May 16-19), but uncertain of exact date of occurrence. 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Wet Snow
Slab Thickness
36.0 inches
Vertical Fall
400ft
Slab Width
75.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Wet Slab, Hollow Top Mtn.

Tobacco Root Mountains
Out of Advisory Area
Code
WS-N-R2-D2-O
Elevation
8800
Aspect
NE
Latitude
45.52890
Longitude
-112.01800
Notes

Wet slab avalanche on Hollow Top Mtn., Tobacco Roots 

ENE facing slope at 8,800’

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
2
D size
2
Bed Surface
O - Old snow
Problem Type
Wet Snow
Slab Thickness
30.0 inches
Vertical Fall
500ft
Slab Width
50.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Wet slab activity near Cooke

Scotch Bonnet
Cooke City
Code
WS-N-R3-D2.5-O
Elevation
10000
Aspect
S
Latitude
45.07120
Longitude
-109.95200
Notes

On May 14 and 15 we saw crowns and debris of wet slabs that ran naturally over the past couple weeks.

Scotch Bonnet, S aspect, 9800'; Sheep Mtn. SW aspect, 9800'; Crown Butte, SE aspect, 10000'.

Hard to say exactly when they all occurred. The slides on Scotch Bonnet and Sheep appeared slightly fresher, but could have been a week old.

Number of slides
3
Number caught
0
Number buried
0
Avalanche Type
Wet slab avalanche
Trigger
Natural trigger
R size
3
D size
2.5
Bed Surface
O - Old snow
Problem Type
Wet Snow
Slab Thickness
36.0 inches
Vertical Fall
800ft
Slab Width
150.00ft
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Multiple Avalanches
Advisory Year

On May 14 and 15 we saw crowns and debris of wet slabs that ran naturally over the past couple weeks.

Scotch Bonnet, S aspect, 9800'; Sheep Mtn. SW aspect, 9800'; Crown Butte, SE aspect, 10000'.

Hard to say exactly when they all occurred. The slides on Scotch Bonnet and Sheep appeared slightly fresher, but could have been a week old.

Avalanche Details: Wet slab activity near Cooke
Cooke City, 2023-05-19

On May 14 and 15 we saw crowns and debris of wet slabs that ran naturally over the past couple weeks.

Scotch Bonnet, S aspect, 9800'; Sheep Mtn. SW aspect, 9800'; Crown Butte, SE aspect, 10000'.

Hard to say exactly when they all occurred. The slides on Scotch Bonnet and Sheep appeared slightly fresher, but could have been a week old.

Cooke City, 2023-05-19

On May 14 and 15 we saw crowns and debris of wet slabs that ran naturally over the past couple weeks.

Scotch Bonnet, S aspect, 9800'; Sheep Mtn. SW aspect, 9800'; Crown Butte, SE aspect, 10000'.

Hard to say exactly when they all occurred. The slides on Scotch Bonnet and Sheep appeared slightly fresher, but could have been a week old.

Avalanche Details: Wet slab activity near Cooke
Cooke City, 2023-05-19