Regional Conditions for Southern Madison

as of 5:00 am
Today0″ | 20-35 S
Jan 26 0″ | 5-20 SE
Jan 25 0″ | 10-15 SE
9460′     01/27 at 09:00
7.6℉
S - 26mph
Gusts 40mph
9000′   01/27 at 8:00
11℉
48″ Depth
Bottom Line: The snowpack from Lionhead through the Bridger Range is shallow with a distinct layer of weak, depth hoar near the ground and a stripe of feathery surface hoar buried under 6-18" of snow. It will take weeks or months to trust these layers fully, but they are adjusting to the current load and avalanches are less likely. Stability is currently similar in these ranges but today's snowfall will heavily favor the mountains around West Yellowstone. As the snow begins to add up, stability will decrease.
Primary Problem: Persistent Weak Layer

Past 5 Days

Sat Jan 23

Moderate
Sun Jan 24

Moderate
Mon Jan 25

Moderate
Tue Jan 26

Moderate
Today

Moderate

Avalanche Activity- Southern Madison

Southern Madison
Taylor Fork
Snowmobile Triggered Avalanche, Sunlight Basin
Incident details include images
Taylor Fork
SS-AKu-R2-D2-O
Elevation: 8,800
Aspect: N
Coordinates: 44.9695, -111.2920
Caught: 0 ; Buried: 0

A snowmobiler triggered an avalanche while side-hilling. No one caught or injured. The debris was estimated to be 8' deep. 


More Avalanche Details
Southern Madison
Ernie Miller Ridge
Natural Avalanche Ernie Miller Ridge
Incident details include images
Ernie Miller Ridge
SS-N-R2-D2-O
Aspect: E
Coordinates: 44.9560, -111.1320
Caught: 0 ; Buried: 0

Skiers reported a natural avalanche on Ernie Miller Ridge. Occurred with minimal new snow on a layer of weak depth hoar


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Southern Madison
Tepee Basin
Snowmobiler triggered avalanche in Tepee Basin
Incident details include images
Tepee Basin
SS-AMu-R2-D2-O
Aspect: E
Coordinates: 44.9041, -111.1850
Caught: 0 ; Buried: 0
 
A snowmobiler triggered a slide in ..." Upper Teepee basin where skyline ridge meets up with I believe Bacon Rind at the Lee Metcalf area and set off a decent avalanche. Luckily the snowmobiler was able to get out of the path of the avalanche and nobody was involved. It looked like the crown was 3-4 ft in spots on a heavily wind loaded slope. Also there was old avalanche debris just to the south of this spot on same aspect of slope."

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Photos- Southern Madison

Displaying 1 - 40
  • A snowmobiler was side-hilling a slope in Sunlight Basin and triggered an avalanche. The rider was not caught or injured. Photo: R. Deleers

  • A natural avalanche on Ernie Miller Ridge failed on deeply buried facets earlier in the week on an east aspect. Skiers continue to report loud whumphs in the area. Photo: R. Wofford

  • A snowmobiler triggered this avalanche on a wind-loaded slope in Tepee Basin on Tuesday, 1/19. No one was caught. Photo: Anon

  • A snowmobiler triggered this avalanche on a wind-loaded slope in Tepee Basin on Tuesday, 1/19. No one was caught. Photo: Anon

  • A snowmobiler triggered this avalanche on a wind-loaded slope in Tepee Basin on Tuesday, 1/19. No one was caught. Photo: Anon

  • Small, natural avalanche on a wind-loaded slope in Carrot Basin in the Taylor Fork. Photo: GNFAC

  • Small avalanche on the Sage Basin Ridgeline in the Taylor Fork. Photo: GNFAC

  • Natural avalanches on Lightning Ridge. There were 10 natural avalanches from Wednesday's snow and wind and event in the Taylor Fork. Photo: GNFAC

  • A pair of avalanches on Lightning Ridge. There were 10 natural avalanches from Wednesday's snow and wind and event in the Taylor Fork. Photo: GNFAC

  • Avalanche in Sunlight Basin. There were 10 natural avalanches from Wednesday's snow and wind and event in the Taylor Fork. Photo: GNFAC

  • Avalanche in Sunlight Basin. There were 10 natural avalanches from Wednesday's snow and wind and event in the Taylor Fork. Photo: GNFAC

  • We looked at the avalanche in Hyalite that was triggered on Saturday 1/9/21. The slope angle was 33-35 degrees. It broke 2-3’ deep on weak facets below a hard slab, 1000’ wide and the debris was 5-9’ deep. East aspect, 9,800’ elevation. Photo: GNFAC

  • Skiers triggered this avalanche on Flanders Mountain on 1/9/21. It was triggered out of the photo to the right on a seperate slope around the corner. It propagated over 1000' wide, and 2-4' deep. Photo: GNFAC

  • From email: "...I found a small piece of this mostly low angle slope to have avalanched, probably from a day or two ago, a handful of older tracks were near it. I measure most of this slope around 26-28 degrees... This is on the farthest south part of the top meadow. An epic amount of whumphs up there, I stopped counting after I got to 10 on my second switch back. Our best one knocked snow out of a tree 100’ away. It feels like remote triggering is a very real possibility. Skies were more overcast than expected. While it never went blue, the sun poked out a little in the afternoon. Cold temps, 0F in the AM, warmed to 24F in the PM. 5-6mm surface hoar everywhere,..." Photo: S. Jonas

  • From email: "...I found a small piece of this mostly low angle slope to have avalanched, probably from a day or two ago, a handful of older tracks were near it. I measure most of this slope around 26-28 degrees... This is on the farthest south part of the top meadow. An epic amount of whumphs up there, I stopped counting after I got to 10 on my second switch back. Our best one knocked snow out of a tree 100’ away. It feels like remote triggering is a very real possibility. Skies were more overcast than expected. While it never went blue, the sun poked out a little in the afternoon. Cold temps, 0F in the AM, warmed to 24F in the PM. 5-6mm surface hoar everywhere,..." Photo: S. Jonas

  • Skiers triggered this avalanche on Flanders Mountain on 1/9/21. It was triggered out of the photo to the right on a seperate slope around the corner. It propagated over 1000' wide, and looks to be 6' deep at deepest. Photo: A. Blackmer

  • We saw this relatively very large, full width avalanches that was triggered on January 7, 2021. It broke on weak, sugary snow below hard wind drifted snow and recent new snow.

  • We saw this relatively very large, full width avalanches that was triggered on January 7, 2021. It broke on weak, sugary snow below hard wind drifted snow and recent new snow. Photo: GNFAC

  • On 1/8/21 we saw this snowmobile triggered avalanches that occurred on January 7, 2021. It broke on weak, sugary snow below hard wind drifted snow and recent new snow. Photo: GNFAC

  • From obs: "Shooting cracks and collapsing on the entire ascent to the Cinnamon Creek Lookout. Remotely triggered a R2-D2.5 on descent. 2-3 foot crown. Slide path was on an East facing slope at 9000ft. Failed on the same persistent weak layer being seen across most regions of the forecast zone."

  • One of many avalanches on the Sage Basin Ridgeline. These were on east through northeast facing slopes at 9300' elevation. The avalanches failed on the weak facets near the ground. Photo: GNFAC

  • One of many avalanches on the Sage Basin Ridgeline. These were on east through northeast facing slopes at 9300' elevation. The avalanches failed on the weak facets near the ground. Photo: GNFAC

  • One of many avalanches on the Sage Basin Ridgeline. These were on east through northeast facing slopes at 9300' elevation. The avalanches failed on the weak facets near the ground. Photo: GNFAC

  • One of many avalanches on the Sage Basin Ridgeline. These were on east through northeast facing slopes at 9300' elevation. They avalanches failed on the weak facets near the ground. Photo: GNFAC

  • We triggered numerous collapses or "whumphs" in the Taylor Fork. Some had associated shooting cracks that propagated up to 20 feet from the point of initiation. Photo: GNFAC

  • We observed two natural avalanches that likely failed 2-3 days ago in the Sunlight Basin in the Taylor Fork. They broke ~150-250 feet wide and ran 250 vertical feet. Photo: GNFAC

  • We observed two natural avalanches that likely failed 2-3 days ago in the Sunlight Basin in the Taylor Fork. They broke ~150-250 feet wide and ran 250 vertical feet. Photo: GNFAC

  • A skier kicked off a larger than expected cornice as they skinned up the ridge on the W side of Beehive basin on Sunday (12/20/20).

  • Recent small snowmobile triggered slides along the Big Sky trail in the Cabin Creek area. Photo taken 12/18/20.

    Photo: J. Norlander

  • Small slides on road cuts along the Big Sky trail triggered by the groomer on Thursday night (12/17/20).

    Photo: M. Global

  • Doug intentionally triggered this wind-loaded sidehill. Weak, faceted snow broke under a 1' deep soft slab of windblown snow. Small avalanches like this are indicators of instability on bigger slopes. These conditions can be found throughout the southern Gallatin, southern Madison, Lionhead and Centennial Ranges. Photo: GNFAC

  • We put up the Taylor Fork Weather station today. It measures wind direction and speed, RH, and temperature. Coupled with the Carrot Basin SNOTEL, this gives us a good idea on what is occurring in this range. Photo GNFAC

  • Light wind created soft drifts of new, low density snow near the ridgeline in the Bridger Range. This wind slab easily cracked when touched with skis, 20 feet along the ridge and 5-10 feet down, but didn't slide. This is a sign drifts will be unstable as they grow with more snow and wind. Photo: GNFAC

  • From IG post: "Weak and thin snowpack. A little sluff was all it took to entrain the whole season’s snowpack. S. Madison ~9000’ east facing" Photo: @vt.to.mt

  • From IG post: "Weak and thin snowpack. A little sluff was all it took to entrain the whole season’s snowpack. S. Madison ~9000’ east facing" Photo: @vt.to.mt

  • Large surface hoar crystals growing in the Upper Taylor Fork drainage on 12/9/20. 

    Photo: E. Birkeland

  • The Gallatin Valley Snowmobile Association put up the beacon checker at the Sage Creek parking lot which leads to Taylor Fork. Thanks GVSA! Photo: GVSA

  • From obs: "Yesterday my partner and I attempted to ski the notch couloir off Koch Peak in the Hilgards. There was a strong western wind that picked up throughout the day, but we didn't notice any recent avalanche activity from the new snow. The snow seemed very consolidated underneath the new 6" or so that had fallen, but once we started skinning up the apron we noticed significant and variable wind-loading, so we dug a pit. Our pit was at the base of the couloir at approximately 10,400 and was directly east-facing. Here is a summary of our pit results: 25cm of large sugary facets at the ground (fist), 5cm ice crust on top of these facets (pencil), a 30cm very consolidated and well bonded layer (1 finger), a 1-2 cm light surface hoar layer, and a 5cm wind-crust ontop of that. We were worried about the deeper, consolidated layer that was sitting on top of the sugary facets propagating so we performed an ECT test and it failed on ETCP-17 on that layer with a Q3 sheer." Photo: L. Ippolito

  • Watch the video HERE!

WebCams


Raynolds Pass, Looking N

Weather Forecast Southern Madison

Extended Forecast for

20 Miles S Big Sky MT

Winter Weather Advisory until January 28, 05:00pm
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until January 28, 05:00pm

    NOW until
    5:00pm Thu

    Winter Weather Advisory

  • Today

    Today: Snow likely, mainly after 1pm.  Areas of blowing snow. Cloudy, with a high near 20. Wind chill values as low as -15. Windy, with a south wind 22 to 30 mph, with gusts as high as 40 mph.  Chance of precipitation is 70%. Total daytime snow accumulation of less than one inch possible.

    Snow Likely
    and Areas
    Blowing Snow

    High: 20 °F

  • Tonight

    Tonight: Snow likely.  Patchy blowing snow. Mostly cloudy, with a temperature rising to around 23 by 5am. Wind chill values as low as zero. South wind 18 to 21 mph, with gusts as high as 30 mph.  Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Snow Likely
    and Patchy
    Blowing Snow

    Low: 16 °F

  • Thursday

    Thursday: Snow likely.  Patchy blowing snow. Mostly cloudy, with a high near 28. Breezy, with a south wind 22 to 26 mph, with gusts as high as 37 mph.  Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    Snow Likely
    and Patchy
    Blowing Snow

    High: 28 °F

  • Thursday
    Night

    Thursday Night: A 50 percent chance of snow.  Patchy blowing snow before 1am. Mostly cloudy, with a low around 24. South wind 18 to 21 mph, with gusts as high as 32 mph.  New snow accumulation of 1 to 2 inches possible.

    Chance Snow
    and Patchy
    Blowing Snow

    Low: 24 °F

  • Friday

    Friday: Snow likely, mainly after 11am.  Mostly cloudy, with a high near 30. South wind 15 to 17 mph, with gusts as high as 28 mph.  Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    Snow Likely

    High: 30 °F

  • Friday
    Night

    Friday Night: Snow likely, mainly before 11pm.  Mostly cloudy, with a low around 20. Southwest wind around 14 mph, with gusts as high as 24 mph.  Chance of precipitation is 60%. New snow accumulation of 1 to 2 inches possible.

    Snow Likely

    Low: 20 °F

  • Saturday

    Saturday: A 30 percent chance of snow.  Partly sunny, with a high near 25. South southwest wind around 15 mph, with gusts as high as 25 mph.  New snow accumulation of less than a half inch possible.

    Chance Snow

    High: 25 °F

  • Saturday
    Night

    Saturday Night: Mostly cloudy, with a low around 17. South southwest wind around 15 mph, with gusts as high as 25 mph.

    Mostly Cloudy

    Low: 17 °F

The Last Word