From email: “These pics are from last June 10-11, after the pass reopened on Friday. I was skiing the Gardner headwall at 5:30, solo, when this monster released. Yah. The initial cornice collapse triggered and entrained a secondary slab of varying thickness whose crown is seen in one of the photos.”
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 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
Attached Videos
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 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
Images
Snow Observation Source
Slab Thickness units
inches
Single / Multiple / Red Flag
Single Avalanche
Advisory Year
Wet slab avalanche on Hollow Top Mtn., Tobacco Roots
ENE facing slope at 8,800’ Photo: S. Miller
Avalanche Details: Wet Slab, Hollow Top Mtn.
Forecast link: GNFAC Avalanche Forecast for Tue May 2, 2023
Out of Advisory Area, 2023-05-22
Forecast link: GNFAC Avalanche Forecast for Tue May 2, 2023
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 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
Images
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.
Avalanche Details: Wet slab activity near Cooke
Forecast link: GNFAC Avalanche Forecast for Tue May 2, 2023
Cooke City, 2023-05-19
Forecast link: GNFAC Avalanche Forecast for Tue May 2, 2023
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.
Avalanche Details: Wet slab activity near Cooke
Cooke City, 2023-05-19