Snow Observations List

N. Gaddy
Cooke City
Fisher Mtn.
Avalanche on Fischer Peak

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. 

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K. Marvinney
Northern Madison
Buck Ridge
Buck Notes

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.

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J. Giglinto
Southern Madison
Fan Mountain
Noticeable crown Fan Mt.

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

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Anonymous
Northern Gallatin
History Rock
Natural Activity NW of Blackmore
Snow Obsdrvation includes images

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.

Otherwise, 12-20cm of new snow was present in the area (~ HS 80-115cm), with evidence of wind loading on east aspects, and scouring on west aspects. No other signs of instability were observed.

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M. Zia
Northern Gallatin
Maid of the Mist
Arden Peak slide
Snow Obsdrvation includes images

Shot from the top of Flanders, ~1400 this afternoon, 3/3/2024. Big slide(s) on Arden and in Maid of the Mist.

 

Looks like the skin track and ski track between the two slides got taken out. At first glance from across the way it looked like the skin track was crossing over the debris, but when zoomed in it looks like the debris overran the skin track and the ski track.

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N. Stayner
Out of Advisory Area
Avalanches above 212
Snow Obsdrvation includes images

From email: "Two big avalanches observed above the “plug” east of Cooke city. on my ride over this AM. One ran to the road, unclear if it went over it and maybe the groomer ran over the debris. Appear natural or possibly snowmo triggered? " 

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GNFAC
Bridger Range
The Throne
New Snow Bridger Range
Snow Obsdrvation includes images
Snow Obs contain video

We rode near the Throne today 03/03/2024. From the truck driving in and out, we saw several natural loose snow avalanches that broke beneath ridgelines and one slab avalanche near Bridger Peak. While riding into the Throne we saw a large natural avalanche south of Ross Peak that likely happened early this morning. Many slopes steeper than 30 degrees had numerous natural and a few human-triggered slough avalanches that entrained storm snow from the last 24 hours, some also entraining snow that fell on Friday as well. These avalanches were large enough to bury a rider or skier. 

Near the throne on an east-facing slope at 7300', we dug a snow pit and found 23" of new snow that had fallen since Friday equaling 2.1" of snow water equivalent. 14" inches of this fell late last night (0.75" of SWE). Our stability tests yeiled ECTN12 results below the new snow. Recent snow made up a little less than half of our snow pit height (HS 133 with 54 cms of new snow since Friday). 

Wind remained calm today where we rode, but all day we saw snow being transported at the ridgeline above. Storm totals were well distributed and at all aspects and elevations we rode we found roughly 20" on recent snow. 

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Z. Dewell
Cooke City
Wolverine Peak
Natural avalanches near Cooke
Snow Obsdrvation includes images

From IG on 3/3/24. Natural on Wolverine and natural between Miller and Sunset. Looked like they went today or yesterday.

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Anonymous
Southern Madison
Bacon Rind
Avalanche in Bacon rind area
Snow Obsdrvation includes images

We saw one avalanche on a southeast facing slope. At about 7,400’ on a North facing slope we experienced a valley shaking whumpf while traveling up a heavily used ski track. 

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Anonymous
Out of Advisory Area
Remotely Triggered Avalanche in Absaroka-BTooths
Snow Obsdrvation includes images
Snow Obs contain video

Remotely triggered a large avalanche on a N aspect at 9500 ft while ascending a ridge line [in Mill Creek, Absaroka]. We estimated the slide to be D3 R3. The crown spanned roughly 1400ft +/- and ranged between roughly 1-5ft deep. They appeared to be 2 distinct layers in the crown profile, one of recent ‘storm’ snow and a lower one above old facets. This was observed from a distance. Witnessed large trees being shaken by the slide and smaller ones completely breaking. The bottom of the run out became much more planar indicating the sheer volume of debris that filled in. Extremely powerful to witness such energy and destruction. All persons in the party were in safe terrain with no intention to ski this slope at all. 

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E. Heiman
Northern Madison
Beehive Basin
Natural Avalanche in Beehive Basin
Snow Obsdrvation includes images

Noticed the pictured recent avalanche on an east facing aspect in the alpine of Beehive Basin. I would estimate it at a D2 size slide. It seems to have been naturally triggered by cornice fall and likely stepped down to older faceted snow deeper in the snowpack. 

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E.
Southern Gallatin
Ramshorn Peak
Trip to buffalo horn pass in Tom miner

Toured from the buffalo horn pass trail head to the pass itself. I didn’t go super high only a little over 8600’. I was shocked by the stability the snowpack showed however. I only had 1 collapse all day and that was at the trailhead. I wasn’t getting cracking at my feet. I definitely don’t trust the snowpack but it is the least reactive place I’ve seen yet to a fresh dump. Definitely some recent wind loading up high. I’d say a foot of new snow at the pass itself and 8” at the trailhead. 

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Z. Cohen
Southern Madison
Cabin Creek
Cabin Creek Whumpfs

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.

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S. Lowe
Northern Gallatin
Very Touchy up Hyalite
Snow Obsdrvation includes images

Toured to the zipper for some 25° meadows and while the skiing was excellent, the stability was not. We triggered numerous thundering whumphs and got shooting cracks, the largest of which propagated at least 100' wide! See snow profile attached with test results.

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Anonymous
Out of Advisory Area
Large natural avalanche on Chico Baldy
Snow Obsdrvation includes images

6" snow since Friday at 6000' in Mill Creek, very strong winds last night. Observed this large avalanche on an east face at treeline, appears to have failed on the weak snow at the base of the snowpack. Additional crowns observed in the bowls and chutes above it (these have been repeat offenders this season). 

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Scott
Northern Gallatin
Maid of the Mist
Continued Signs of Instability

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. 

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W. Shoutis
Butte Area
Flint Creek Range
Snowmobile triggered avalanche Twin Peaks
Snow Obsdrvation includes images

Secondhand photo and story regarding two snowmobilers sidehilling the northwest aspect of Twin Peaks and triggering the slide in the photos.  They were both able to ride out of it.  This avalanche is located about 150 yards north of the Twin Peaks avalanche accident site from January 2024.

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BPG
Cooke City
COOKE CITY
Cooke City Observations 03/02

Guides at Beartooth Powder Guides saw numerous natural avalanches near Cooke City. They noted new snow avalanches on most slopes steeper than 30 degrees. Additionally, they saw several avalanches that broke several feet deep on east, southeast, and southwest-facing terrain. 

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Anonymous
Bridger Range
Hourglass Chute
Avalanche in Hourglass
Snow Obsdrvation includes images

From IG 3/2: A skier triggered this slide in the Bridgers.

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I think this was skier triggered, but waiting for a response.

Northern Gallatin
Rider triggered new snow slab
Snow Obsdrvation includes images

Photo from IG, slide occurred night of 3/1.

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