23-24

Natural Avalanche on Fan Mountain

Fan Mountain
Southern Madison
Code
N
Elevation
9500
Aspect
E
Latitude
45.29490
Longitude
-111.52700
Notes

From obs on 03/04/2024: "While traveling to Big Sky from Ennis, I noticed a large avalanche on the east face of Fan Mt.

Crown appears to start at approx. the 9500' elevation with a vertical drop of at least 2000'.  Crown appears to be 200-300 yards wide"

Number of slides
1
Number caught
0
Number buried
0
Trigger
Natural trigger
Slab Width
750.00ft
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Whumpfing in Cabin Creek

Cabin Creek
Southern Madison
Code
Latitude
44.89490
Longitude
-111.22800
Notes

From obs: "We were skiing out of the Cabin Creek cabin over the weekend, mostly in the low angle terrain around Skyline Ridge. Throughout the storm on Saturday and after the clouds cleared on Sunday we experienced consistent whumpfing while breaking trail. Some were larger and some were smaller, usually triggered by the person breaking trail but some of the larger ones were triggered by the second or third skier in the track."

Number of slides
0
Number caught
0
Number buried
0
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Red Flag
Advisory Year

Natural Activity on Mt. Blackmore

Mt Blackmore
Northern Gallatin
Code
L-N
Aspect
E
Latitude
45.44440
Longitude
-111.00400
Notes

From obs on 03/03/2024: "White touring in the History Rock area, I spotted a couple of recent slides on the NW shoulder of Mt. Blackmore. From a distance, these look like dry-loose slides on the recent snow interface around 8,500ft. on a N-NE aspect."

 

Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Loose-snow avalanche
Trigger
Natural trigger
Snow Observation Source
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year

Avalanche on Fischer Peak

Date
Activity
Snowmobiling

Observed a debris pile on the east face of Fischer Peak. Unable to determine when and what triggered it. Numerous debris piles on the Rasta Chutes on Scotch Bonnet. 

Region
Cooke City
Location (from list)
Fisher Mtn.
Observer Name
Nick Gaddy

Buck Notes

Date
Activity
Snowmobiling

The Snow Ranger crew was out on Buck Ridge today.  We did not see any new slides around Beaver Creek, 1st Yellowmule, or Slatts Hill/ upper Buck Creek.  It began snowing before we made it to the McAtee/ 3rd Yellowmule area but from what we could see, it looked like the N/NE faces in McAtee that slid just over a week ago had avalanched again, nearly to the ground.  There were slightly dirty looking debris piles mid slope and several prominant crowns just below the ridge top but it was hard to make out details through the light snow, even with binoculars.

Region
Northern Madison
Location (from list)
Buck Ridge
Observer Name
K. Marvinney

Noticeable crown Fan Mt.

Date

While traveling to Big Sky from Ennis, I noticed a large avalanche on the east face of Fan Mt.

Crown appears to start at approx. the 9500' elevation with a vertical drop of at least 2000'.  Crown appears to be 200-300 yards wide

Region
Southern Madison
Location (from list)
Fan Mountain
Observer Name
Jim Giglinto

Cabin Creek Whumpfs

Date
Activity
Snowboarding

We were skiing out of the Cabin Creek cabin over the weekend, mostly in the low angle terrain around Skyline Ridge. Throughout the storm on Saturday and after the clouds cleared on Sunday we experienced consistent whumpfing while breaking trail. Some were larger and some were smaller, usually triggered by the person breaking trail but some of the larger ones were triggered by the second or third skier in the track.

Region
Southern Madison
Location (from list)
Cabin Creek
Observer Name
Zach Cohen

Continued Signs of Instability

Date
Activity
Skiing
Snowboarding

Continued signs of instability on a tour in Maid of the Mist Basin. A couple large collapses down low in the trees, wind slabs above tree line on variable aspects due to swirling wind up high. Large avalanche crown (10’ - 12’ in places) at the back of the basin which looked to have been trigger from cornice fall 3-4 days ago. ECTP 28 55cm off of ground on a 5cm thick layer of facets. Pit was dug on an east facing slope at 9,100 feet. 

Region
Northern Gallatin
Location (from list)
Maid of the Mist
Observer Name
Scott