24-25

Wind Slabs at the Sphinx

Date
Activity
Ice Climbing

Triggered a small wind slab:

-9600'

-N aspect on the NW ridge of Sphinx Mountain 

-Strong SW wind

-Noticed other small crowns, likely triggered from another party traversing the north-facing bowl at similar elevations

Region
Southern Madison
Location (from list)
Sphinx Mountain
Observer Name
Steph Bonucci

Early season avalanche, outside advisory area

Out of Advisory Area
Code
N-R2-D2
Elevation
9400
Aspect
E
Latitude
45.30290
Longitude
-110.63500
Notes

Avalanche observed on Chico Baldy above Mill Creek in Paradise Valley.  East aspect at about 9400'. Possibly a wind slab but hard to tell

Number of slides
1
Number caught
0
Number buried
0
Trigger
Natural trigger
R size
2
D size
2
Problem Type
Wind-Drifted Snow
Vertical Fall
800ft
Slab Width
70.00ft
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Early season avalanche

Date

Avalanche observed on Chico Baldy above Mill Creek in Paradise Valley.  East aspect at about 9400'. Possibly a wind slab but hard to tell

Region
Out of Advisory Area

Early season snow, Lulu Pass Rd

Date

Drove up Lulu Pass road 1/4 mile from hwy 212. There was 7-8" of snow that fell since November 1 on previously snow-free southerly facing meadows around 8,100'. 

Region
Cooke City
Observer Name
Alex Marienthal

From e-mail: "Photo attached from near top of hyalite peak, 11/2. Cracking in recent hard wind slab, I had to really jump hard to make this. Walked on many other hard slabs that were well bonded. Highly variable snowpack. I think you'd be most likely to get into trouble by popping out a small hard slab pocket like this and getting magic carpeted into some thinly covered terrain." Photo: B. VandenBos

Northern Gallatin, 2024-11-04

Hard wind slabs in Hyalite

Date
Activity
Skiing

From e-mail: "Photo attached from near top of hyalite peak yesterday eve , 11/2. Cracking in recent hard wind slab, I had to really jump hard to make this. Walked on many other hard slabs that were well bonded. Highly variable snowpack. I think you'd be most likely to get into trouble by popping out a small hard slab pocket like this and getting magic carpeted into some thinly covered terrain."

Region
Northern Gallatin
Location (from list)
Hyalite - main fork
Observer Name
Ben VandenBos