Snow Observations List

Anonymous
Wet snow avys, all over East side of Bridgers

I'm sure you don't need me to tell you there are wet slides all along the east side of the Bridgers,  but here I am telling you anyway.

I was riding my ATV up Olson Creek and took a few pictures from the top, but I was pretty far away for a cell phone...

If you want them, I'll send them over.

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C. C
Northern Gallatin
Beehive Basin
Spring Conditions in Beehive Basin

Toured into Beehive Basin today. The added snow from the storm this week made quite a difference in coverage (which was already still really good) and it looks like the middle of winter up there. Temps were warm and the snowpack felt homogenous and stable. Planned to ski peak 10602 but we noticed some wind loading and weather coming in so we toured up and around climbers left of the prow and skied down the climbers right side of it. Skinning in we saw a lot of wet loose avalanche debris and a couple slides that looked like they slid a couple days ago from the last storm. We heard multiple slides coming off of rocks and watched a cornice break off climbers left of 4th of July Couloir. We also saw some wet loose debris that slid on 10602 on our way out of the basin. By 10am it was very warm and the snow was wet, sticky and heavy. 

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N. Greiner
Northern Madison
Beehive Basin
shooting cracks in middle basin
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shooting cracks in the top 4 to 5 inches of new snow in middle basin

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T. Jordan
Bridger Range
Bridger Bowl
Storm slab avalanches at Bridger Bowl
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Toured to the top of PK during today’s storm. Snow was very wet and heavy. We saw no other slides or signs of instability on the way up. Coming down skiers right of flippers, all 3 of us caused small slides and cracking within the new snow. I triggered the largest slide, which was 6-8” deep and 12’ wide.

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A. Kautzer
Northern Gallatin
Hyalite Peak
Avalanche in Hyalite
Snow Obsdrvation includes images

Wet snow avalanche at around 9300’ on a northwest aspect in Hyalite basin. Group opinions on crown height ranged from 1-5 feet - hard to tell from a distance. 

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Anonymous
Cooke City
Fisher Mtn.
Fisher Avalanche, snowmobiler triggered
Snow Obsdrvation includes images

From email 5/16/24: "I saw the photo of the fisher peak avalanche on the website. Figured I could fill in the blanks. Not a natural slide, snowmobile triggered.

At approximately 12:15pm last Saturday I was climbing above fisher bench and unintentionally set off a slab avalanche on fisher peak. I was jumping the cornice at the ridge and had a massive slope collapse, followed by shooting cracks and propagation downslope. I was able to wheelie through the crown and sidehill above the slide away from the debris area.

5 minutes before my climb, another snowmobiler put a high mark 60 ft away from where I climbed with no results. There were numerous tracks on the slope prior to this avalanche, I found the weak spot. My riding partner was watching me from a safe zone further south, as we knew there was new snow instabilities to watch out for, at a minimum.

We rode all day Friday without any obvious instabilities on similar slopes. We didn’t see the sheep mountain slide Friday morning. I took some pictures of the slide right after it happened. See attached…"

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A. Kautzer
Cooke City
Mt. Zimmer
more recent avalanches in Cooke
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Saw a few slides that look like they propagated across the layer of new snow from the last storm (as opposed to the characteristic spring wet snow point releases). The largest was the previously reported one from Sheep. On the way out we saw a smaller slide farther south along the same ridge that looked like it broke on the new snow interface, both NE aspects.

We also saw a similar slide on a N/NW aspect of Mt Zimmer. 
 

Hard to say from a distance when these broke, but the one on Mt Zimmer looked the most recent. 

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B. Zavora
Cooke City
Sheep Mountain
Recent avalanches
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From email 5/11/24: “Hey Guys, here are a few photos from the weekend. The sheep Mountain Avalanche was Snowmobile triggered on Friday and the fisher peak avalanche happened today. Maybe cornice drop?”

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T. Miller
Bridger Range
Ross Peak
New snow instability

From IG message 5/10: "Made it most the way up Ross today turning around at the step up to the east shoulder. New snow is resting on a layer of graupel. New snow has not bonded to the old. CT12, Q2 at 90cm from the ground. HS=150cm'

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W. Hubbard
Bridger Range
Bridger Bowl
Warming quick in the Bridgers

Up on the Ridge this morning, the recent snow had developed a 3-5 cm crust, and remained moist underneath. No active signs of instability while the snow remained cold, except for the various crowns from slides which broke during the storm (Avalanche Gulch, North Bowl, etc.), and lots of rollerballs from yesterday. Within an hour of sunrise the surface crust began to break down, and small loose releases were beginning to rain down from cliffs and around the large cornices. The cornices, some reaching the size of a small car, were already visibly sagging and many smaller cornices easily released under body weight.

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BPG
Cooke City
Round Lake
Remote triggered storm slabs
Snow Obsdrvation includes images

From IG story 5/8/24: "@mtavalanche remote triggers today in Cooke City. 2-4' of fresh north of round lake."

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B. VandenBos
Bridger Range
Bridger Bowl
large avalanches at Bridger
Snow Obsdrvation includes images

From email 5/8/24: "A few snaps from today. Observed several D2 slides between sluice box and the nose. I didn't see the toe of these slides, but it looked like there were running with some speed into mid elevation terrain. Slabs were most common in winded terrain, but slides flanked out on new/old interface and 4/26 crust (these layers are not very far apart) even in sheltered middle elevation terrain. Visibility was poor, but I'd expect to see similar large slides in steep, winded terrain

4/26 crust down:

55-60cm at 6500

65-70cm at bridger mid 

75+cm at ridgeline"

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P Hinz
Bridger Range
Bridger Bowl
Multiple Avalanches around Peter’s Point
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A skier near the top of the Alpine Lift at Bridger Bowl ski area took a photo of three avalanche crowns near Peter’s Point. 

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Anonymous
Northern Madison
Beehive Basin
Avalanche on Beehive Basin Test Slope
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A skier triggered an avalanche on a test slope in Beehive Basin, breaking 12-16" deep and 75' across. The slide failed within the new snow. 

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P. H.
Northern Gallatin
NORTHERN GALLATIN RANGE
Large avalanche in northern Gallatin
Snow Obsdrvation includes images

Saw a very large crown on a north face of a peak west of the hyalite area. Potentially peak 9662. The crown appears to wrap around multiple aspects for about 1/4 mile. Seen from the Bridgers around noon on May 4th. Probably went during this weeks storm, but it looks to me like it was much deeper than a storm slab.

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Anonymous
Bridger Range
Wolverine Bowl
Large avalanche near Wolverine cirque

On 5/4/24 “…. a friend toured around Wolverine today. On his way out he heard a slide breaking trees (just before noon). Unknown location but he said it sounded like it was around/ above Texas Meadows. The action continues!”

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Anonymous
Cooke City
Republic Mountain
Wet loose on the fin
Snow Obsdrvation includes images

Our party (3) triggered a significant wet loose slide on the fin today. I, the first skier dropped in next to existing tracks from earlier in the morning. I made a couple of small turns in unskied snow to test it and decided that not much was moving. As I continued down the wet surface snow started to slide and accumulate. My partner called me on the radio to tell me a lot of snow was moving behind me and I cut left. I traversed hard to lower angle terrain until I felt I could safely descend the rest of the slope.  My partners descended the bed surface until they could traverse out. 

We made several key mistakes today.  We knew it would be warm and that we should be up and down early.  We left later than planned, moved slower than expected and failed to adjust our plan.  We mistook lack of wet loose activity on similar aspects and elevations on features we could see as sign of stability.  We failed to make a plan B or establish a turnaround time.  We interpreted a party ahead of us that skied the slope as a go ahead.  Another party approaching behind us added pressure to go. They also skied the slope after us in similar style to my partners.

In our favor, we communicated well, radios were key, stayed calm and we managed ourselves through the situation. I feel humbled and lucky to have gotten away with a free lesson.  One that I didn't think I should have needed.

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Cooke City
Wolverine Peak
North side of Wolverine
Snow Obsdrvation includes images

Wind load on old crust, probably from Wednesday. 

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B. VandenBos
Bridger Range
Bridger Bowl
Skier triggered slab at Bridger
Snow Obsdrvation includes images

From email 5/2/24: "Triggered in the virtues this evening. 40' wide, 4-12" deep, failed as a dense, wind-packed slab on the rain/sun/heat crust underneath the most recent snow.  I had marginal visibility but it looked like there were similar small-ish wind pockets that had failed in a few spots. Good skiing up high, fun first day up there."

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Anonymous
Cooke City
Sheep Mountain
Rider/skier triggered avalanche
Snow Obsdrvation includes images

From email 5/1/24: "Hi crew. I triggered a soft slab avalanche on the North side of Sheep Mountain today. D1.5 200’ wide ran 200’.  Crown was 6-12’’ deep. I was able to ride out of it and anchor in a safe spot. 

It broke on our 7th lap and we had seen no signs of instability prior to the avalanche but wind loading was occurring and obvious. The avalanche broke and on a dirty crust that formed during a rain event last week."

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