Trip Planning for Southern Madison

as of 5:00 am
Today4″ | 30-70 SW
Feb 29 1″ | 21-30 SW
Feb 28 1″ | 19-31 SW
9460′     03/01 at 02:00
21.1℉
SW - 29mph
Gusts 56 mph
9000′     03/01 at 07:00
24℉
61″ Depth
Primary Problem: Wind-Drifted Snow
Bottom Line: It is snowing and blowing and human triggered avalanches are likely. In places with more new snow, avalanches in that new snow will be easily triggered. Avalanches breaking in drifts are the likeliest problem you’ll encounter today and would be large enough to bury you. The weak layers that have been consistently avalanching for the last two months are also being loaded again. Keep your slope angles less than 30 degrees while we wait and see how they handle this loading event.

Past 5 Days

Mon Feb 26

Considerable
Tue Feb 27

High
Wed Feb 28

Considerable
Thu Feb 29

Considerable
Today

Considerable

Relevant Avalanche Activity

Southern Madison
Taylor Fork
Storm Slab Avalanche Sage Basin
Incident details include images
Taylor Fork
SS-N-R1-D1-I
Elevation: 9,100
Aspect: N
Coordinates: 45.0607, -111.2720
Caught: 0 ; Buried: 0

We noted a relatively small storm slab avalanche the failed on the wall of Sage Basin. 


More Avalanche Details
Southern Madison
Tepee Basin
Whumps and collapsing in the flats - Tepee Creek
Tepee Basin
Coordinates: 44.9041, -111.1850
Caught: 0 ; Buried: 0

Nothing new, but we were in Tepee Creek today.  Three of us dropped into a flat meadow on a (wide) ledge, and after sitting there for a minute or less, we all felt a "whump" and collapse. While the meadow had some small rolling terrain, it was flat overall.


More Avalanche Details
Southern Madison
Bacon Rind
Large Collapses Bacon Rind
Bacon Rind
Coordinates: 44.9609, -111.1000
Caught: 0 ; Buried: 0

From obs: "the snow is still bad! We were on top of bacon rind in the YNP, and dug a pit for fun and education of one of our party members. Experienced some BIG whoomphs on the way up and got very unstable scores. A Q2 CT19 and ECTP24, both around 85cm down into the snow pack (on the top of the very faceted layer we're seeing all over the advisory area."

 


More Avalanche Details

Relevant Photos

Displaying 1 - 40
  • We noted a relatively small avalanche on the wall of Sage Basin that failed naturally within the storm snow. Photo: GNFAC

  • Skiers on 02/22/2024 observed an old avalanche that appeared to of been natural that happened sometime last week near 02/15 -02/16. Photo: H. Bigos-Lowe

  • The skillet slid sometime recently. Based on the snow on top I'm guessing Thursday-Friday last week (Feb 15-16th), but it could have happened up to a week earlier. Broke ~2 ft deep, 150 ft wide, and it was hard to tell how far it ran, but I'm estimating 200 vertical feet. Photo: GNFAC

  • From IG: 2 avalanches from either this morning or yesterday at the bottom of Skyline ridge 2’ at the crown

  • From FB 02/17/24: "Observed runout debris from a small avalanche on a south facing forested slope in Upper Tepee Basin. Shows avalanches can occur through forested areas." Photo: C. Sexton

  • From obs: "We observed another, probably rider triggered avalanche in Wapiti Creek that broke on old snow near the ground ~2 feet deep and ~60ft across." Photo: S. Jett

  • From obs: "We observed large natural avalanches from afar on the west side of Snowslide Mountain. We observed these from a few miles away and were probably several feet deep and a few hundred feet wide." Photo: S. Jett

  • From obs: "We observed large natural avalanches from afar on...the east aspect of a peak south of Woodward Mountain. We observed these from a few miles away and were probably several feet deep and a few hundred feet wide." Photo: S. Jett

  • Natural avalanche in Sunlight Basin. Photo taken 2/14/24. Slide appeared to be a few days old. Photo Credit: GNFAC

  • Avalanche in Sage Basin that appeared likely to have been remotely triggered by a snowmobiler from ~100 ft away. Photo taken 2/14/24. Slide was fresh, likely broke yesterday, 2/13/24. Photo Credit: GNFAC

  • Natural avalanche in Sage Basin. Photo taken 2/14/24. Slide appeared to be a few days old. Photo Credit: GNFAC

  • Natural avalanche in Sage Basin. Photo taken 2/14/24. Slide appeared to be a few days old. Photo Credit: GNFAC

  • An overview photo of the 3/4 mile wide avalanche in Tepee Basin. Photo: A. Vaughn

  • Photo of a natural avalanche that was reported on 02/09/2024. Photo taken on 02/10/2024. Photo: Z. Peterson

  • Photo of a natural avalanche that was reported on 02/09/2024. Photo taken on 02/10/2024. Photo: Z. Peterson

  • A portion of the debris pile from a rider triggered an avalanche on 02/07/2024. This avalanche broke 3/4 of a mile wide and had multiple large piles of debris with this being one of the largest. 

  • The contiuation of the crown of an avalanche that was remotely triggered by a rider on 02/07. This was a very wide avalanche that broke 3/4 of a mile long, 3-4' deep. Photo: GNFAC

  • The crown of an avalanche that was remotely triggered by a rider on 02/07. This was a very wide avalanche that broke 3/4 of a mile long, 3-4' deep. Photo: GNFAC

  • This crack opened up above our snowpit as we made our exit away from the steeper terrain of the "Skillet" run toward low-angle trees. Photo: GNFAC

  • We triggered booming collapses and watched cracks shoot out across terrain features and snow shake off nearby trees for the entirety of our tour from the meadow near the car to the top of the Skillet. Photo: GNFAC

  • From obs: "We heard numerous large-scale collapses and witnessed the development of propagating tensile fractures on a 20°-25° slope along the skin track.... We skied this location 4 times this week. Each time, we experienced collapsing and fracturing within the snowpack. and stuck to skiing conservative, low-angle lines." Photo: T. Kalakay

  • We saw multiple old avalanches that happened sometime in the last week, likely near the end of the last storm. Photo: GNFAC

  • We saw multiple old avalanches that happened sometime in the last week, likely near the end of the last storm. Photo: GNFAC

  • Recent avalanches seen in Taylor Fork near Beaver Creek. These likely happened on 01/31/2024. Photo: GNFAC

  • From email: "A friend and I were riding in lower Tepee today, staying on low angle terrain because of the current avalanche conditions. When side hilling on a 24 degree slope, I saw cracks shoot out approximately 100 feet around me. It was a smaller slope, but things are still pretty sensitive. This was a north facing slope in a valley that shouldn’t have been too wind loaded. " Photo: J. Norlander

  • From email: "A friend and I were riding in lower Tepee today, staying on low angle terrain because of the current avalanche conditions. When side hilling on a 24 degree slope, I saw cracks shoot out approximately 100 feet around me. It was a smaller slope, but things are still pretty sensitive. This was a north facing slope in a valley that shouldn’t have been too wind loaded. " Photo: J. Norlander

  • Do you like to hike? Do you like to ski? Then the King & Queen of the Ridge is for you. Hike, ski and raise money for the Friends of the Avalanche Center in their 2nd biggest fundraiser of the year. Join the effort to promote and support avalanche safety and awareness! Fundraising prizes for top 5 individuals who raise over $500. No racing is necessary to compete for the fundraising prizes. Info to fundraise is HERE or donate here. Race participants for the [insert dates] event must register separately with Bridger Bowl here.

  • From obs: "This avalanche is old and likely happened a few days ago near the end of the last storm on 01/20. NE facing slope at ~8500 feet." Photo: GNFAC

     

  • From obs: "Saw lots of shooting cracks and triggered a small slide on a short steep hill." Photo: Anonymous 

  • Several natural avalanches were observed on the ridge above the cabin in Cabin Creek. Photo: Anonymous 

  • Natural & remote trigger avalanches observed on most steep terrain. Photo: J. Kinnison. Photo taken 1/18/24

  • Natural & remote trigger avalanches observed on most steep terrain. Photo: J. Kinnison. Photo taken 1/18/24

  • 3-4 cm long surface hoar buried by recent storm snow. Photo: GNFAC

  • Cracking while riding in Taylor Fork. Photo: GNFAC

  • Cracking near the crown of an avalanche that was triggered from the flats. Photo: GNFAC

  • A rider triggered avalanche on a small slope. This was triggered from the flats 10-40' away. Photo: GNFAC

  • A rider triggered avalanche that happened on Jan. 10th. This was a small slope but broke 1' deep and is the width of the terrain feature. Photo: GNFAC

  • Ian Hoyer assessing the crown of an avalanche that was triggered from flats above while on foot. Photo: GNFAC

     

  • A 12" crown of an avalanche that was triggered from the flats above. Photo: GNFAC

Videos- Southern Madison

WebCams


Raynolds Pass, Looking N

Snowpit Profiles- Southern Madison

 

Select a snowpit on the map to view the profile image

Weather Forecast Southern Madison

Extended Forecast for

20 Miles S Big Sky MT

Winter Storm Warning until March 1, 05:00pmClick here for hazard details and duration Winter Storm Warning
  •  Winter Storm Warning until March 1, 05:00pm

    NOW until
    5:00pm Fri

    Winter Storm Warning

  • Today

    Today: Snow.  High near 27. Windy, with a south southwest wind 34 to 40 mph, with gusts as high as 45 mph.  Chance of precipitation is 80%. Total daytime snow accumulation of 2 to 4 inches possible.

    Snow and
    Windy

    High: 27 °F

  • Tonight

    Tonight: Snow likely, mainly after midnight. The snow could be heavy at times.  Mostly cloudy, with a low around 19. Wind chill values as low as zero. Windy, with a south wind 28 to 32 mph.  Chance of precipitation is 70%. New snow accumulation of 3 to 5 inches possible.

    Windy. Chance
    Snow then
    Heavy Snow

    Low: 19 °F

  • Saturday

    Saturday: Snow. The snow could be heavy at times.  Temperature rising to near 26 by 11am, then falling to around 16 during the remainder of the day. Wind chill values as low as -5. Windy, with a south southwest wind 33 to 41 mph, with gusts as high as 45 mph.  Chance of precipitation is 100%. New snow accumulation of 4 to 8 inches possible.

    Heavy Snow
    and Windy

    High: 26 °F⇓

  • Saturday
    Night

    Saturday Night: Snow likely, mainly before 11pm.  Mostly cloudy, with a low around 3. Wind chill values as low as -15. Windy, with a south southwest wind 31 to 36 mph decreasing to 18 to 23 mph after midnight.  Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Windy. Snow
    Likely then
    Chance Snow

    Low: 3 °F

  • Sunday

    Sunday: Snow likely, mainly after 11am.  Partly sunny, with a high near 18. West southwest wind 13 to 18 mph, with gusts as high as 24 mph.  Chance of precipitation is 60%. New snow accumulation of around an inch possible.

    Snow Likely

    High: 18 °F

  • Sunday
    Night

    Sunday Night: A 50 percent chance of snow.  Mostly cloudy, with a low around 2. South southwest wind 10 to 16 mph, with gusts as high as 24 mph.  New snow accumulation of less than one inch possible.

    Chance Snow

    Low: 2 °F

  • Monday

    Monday: A 50 percent chance of snow, mainly after 11am.  Partly sunny, with a high near 16. South wind 10 to 18 mph, with gusts as high as 25 mph.  New snow accumulation of less than a half inch possible.

    Chance Snow

    High: 16 °F

  • Monday
    Night

    Monday Night: A chance of snow.  Mostly cloudy, with a low around 6. South wind around 18 mph, with gusts as high as 29 mph.

    Chance Snow

    Low: 6 °F

The Last Word

Clear weather and temperature fluctuations can make a weak layer in the top few cm of the snowpack called near-surface faceting. There are 3 dominant types which are explained in Bruce Jamieson’s new video featuring Karl Birkeland, Doug Chabot, Ed Adams, Mike Cooperstein, Ethan Greene and Mark Staples.

2 / 29 / 24  <<  
 
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