Trip Planning for Lionhead Range

as of 5:00 am
Today3″ | 65-100 W
Feb 29 2″ | 25-37 W
Feb 28 1″ | 24-43 SW
9420′     03/01 at 03:00
20.6℉
W - 64mph
Gusts 111 mph
7750′     03/01 at 05:00
29℉
56″ Depth
Primary Problem: Wind-Drifted Snow
Bottom Line: Wind is blowing at all elevations and scraping away the fresh snow into thick drifts which are dangerous and could be triggered. The weight of recent wind drifts are making slopes unstable. A person is likely to trigger a slide if they get into avalanche terrain. Even small slopes can avalanche and these point to instability that can be found on bigger slopes.

Past 5 Days

Sun Feb 25

Considerable
Mon Feb 26

Considerable
Tue Feb 27

Considerable
Wed Feb 28

Considerable
Thu Feb 29

Considerable

Relevant Avalanche Activity

Lionhead Range
Lionhead Ridge
Several Recent Avalanches at Lionhead
Incident details include images
Lionhead Ridge
SS-N
Aspect: E
Coordinates: 44.7145, -111.3180
Caught: 0 ; Buried: 0

On 02/29/2024: From the parking lot near Hebgin Lake, we were able to see several natural avalanches that happened on Lionhead Ridge. These avalanches all occurred in a similar timeframe to each other. While riding below Lionhead Ridge we observed another avalanche that likely happened a few days prior near 02/27/2024. 

 


More Avalanche Details
Lionhead Range
LIONHEAD AREA
Avalanche between Bald Peak and Lionhead
Incident details include images
LIONHEAD AREA
SS-N-R3-D3-O
Aspect: W
Coordinates: 44.7286, -111.3290
Caught: 0 ; Buried: 0

A rider reported a large avalanche in Targhee Creek that likely broke on Feb 23. He estimated the slide broke 1000' wide, 3-4' deep and ran 650' vertical. 


More Avalanche Details
Lionhead Range
Lionhead Ridge
Remotely triggered avalanche Lionhead
Incident details include images
Lionhead Ridge
HS-AMr-R3-D2-O
Elevation: 8,900
Aspect: N
Coordinates: 44.7145, -111.3180
Caught: 0 ; Buried: 0

On 2/16/24 we saw a fresh avalanche in Watkins Creek that we think was triggered remotely during the day by a group riding in a flat meadow above, where we saw their tracks at least 150 feet away (photo). This slide was 2-3' deep and 100-150' feet wide, breaking on old sugary snow. HS-R3/4-D2-O. We rode along the flat terrain above the avalanche and could feel our sled tracks punch through the supportable slab into weak snow at the bottom of the snowpack.

We felt a couple collapses while sitting on our sleds, and saw a couple long shooting cracks while riding. We dug a snowpit in Targhee creek on a northwest facing slope at 9,435'. We had an ECTP27 below a 2.5' deep slab, sitting on 1.5' of weak sugary snow.


More Avalanche Details

Relevant Photos

Displaying 1 - 40
  • While riding below Lionhead Ridge we observed a wind slab avalanche that likely happened a few days ago. This avalanche looked to be 12" deep and broke 100' wide. Photo: GNFAC

     

  • Riders spotted this large avalanche on a west-facing aspect in Targhee Creek in the Lionhead area on Saturday. Photo: K. Stahl

  • From email: "We noticed a multitude of slides on north- and east-facing slopes, many of which seemed to have been from the prior weekend. I snapped a picture of one on the opposite side of the drainage that was a couple of feet deep. Adjacent to it was some more debris." 

  • On 2/16/24 we saw a lot of old and recent avalanches that happened at various times over the last week, and in a wide variety of terrain. On lower elevation, generally non-wind-loaded terrain in the trees we saw at least 4 avalanches that were 1-2' deep and at least 100' wide. Near ridgelines there were many avalanches, harder slabs, at least 1-2' deep breaking hundreds of feet wide. Photo: GNFAC

  • On 2/16/24 we saw a lot of old and recent avalanches that happened at various times over the last week, and in a wide variety of terrain. On lower elevation, generally non-wind-loaded terrain in the trees we saw at least 4 avalanches that were 1-2' deep and at least 100' wide. Near ridgelines there were many avalanches, harder slabs, at least 1-2' deep breaking hundreds of feet wide. Photo: GNFAC

  • We saw a fresh avalanche in Watkins Creek that we think was triggered remotely during the day on 2/16 by a group that was riding in a flat meadow above, where we saw their tracks at least 150 feet away (photo). This slide was 2-3' deep and 100-150' feet wide, breaking on old sugary snow. HS-R3-D2-O. Photo: GNFAC

  • A pit in the flank of an avalanche above Hebgen Lake. The stripe in the picture delineates the new snow over the unstable, old, faceted snow. This interface is where avalanches are occurirng. Karl Birkeland was using his 100 cm long Norwegian Battle Saw...a bit overkill. Photo: GNFAC

  • Crossing onto the debris of a large avalanche that likely released a couple days ago above Hebgen Lake. Photo: GNFAC

  • Skiers saw an entire bowl filled with shooting cracks where weak layers failed but the slope was not steep enough to avalanche. Photo: H Darby

  • An avalanche that failed a couple of days ago at Hebgen Lake. Photo: H. Darby

  • A group of riders triggered this large avalanche on Lionhead Ridge as they traveled in nearby terrain that was much less steep. Photo: T. Urell

  • From obs: "There were shooting cracks everywhere, and it looked like the cracks propagated into a slab that would have broken up more if the slope had been steeper. It almost looked like a crevasse field with how many cracks there were. Photo is included but I don't think shows just how broken up that "relatively benign" terrain was. I have never seen anything like that before! " Photo: H. Darby

  • Two natural avalanches that likely happened in the last 24-48 hours. 500' wide. "Crown line extends basically the entire ridge in the background." Photo. H. Darby

     

  • The crown of a natural avalanche likely happened in the last 12 hours. This avalanche broke 200' wide, 3-4' deep, and ran "almost full path" to the trees below. Photo: H. Darby

     

     

  • Avalanche along Lionhead Ridge that appeared to be several days old. 1/26/24 Photo: GNFAC

  • Avalanche on Lionhead Ridge that appeared to be several days old. 1/26/24 Photo: GNFAC

  • Avalanche in Targhee Creek that appeared to be several days old. 1/26/24 Photo: GNFAC

  • A slide in Watkins Creek broke across three avalanche paths/gully features and was one of the larger slides we've seen this season, looking to have piled up debris 10+ ft deep. Looks to have broken in the last 24 hours. 1/26/24 Photo: GNFAC

  • A slide in Watkins Creek broke across three avalanche paths/gully features and was one of the larger slides we've seen this season, looking to have piled up debris 10+ ft deep. Looks to have broken in the last 24 hours. 1/26/24 Photo: GNFAC

  • Avalanche that looks to have been remotely triggered at Lionhead in the last 24 hours. 1/26/24 Photo: GNFAC

  • Avalanche that looks to have been remotely triggered at Lionhead in the last 24 hours. 1/26/24 Photo: GNFAC

  • 1/26/24 Photo: GNFAC

  • 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.

  • Riders on Lionhead Ridge spotted this natural avalanche that occurred on January 21. 

  • This natural avalanche failed the morning of January 21 on a steep slope at Lionhead. Photo: GNFAC

  • On Sawtelle Peak, Island Park, when the clouds lifted we could see a crown of a snowmobiler triggered slide that occurred yesterday. It broke on the buried surface hoar and facets about 1.5 feet under the surface. Recent snow and wind-loading has created dangerous avalanche conditions. Photo: GNFAC

  • On Sawtelle Peak, Island Park, when the clouds lifted we could see a crown of a snowmobiler triggered slide that occurred yesterday. It broke on the buried surface hoar and facets about 1.5 feet under the surface. Recent snow and wind-loading has created dangerous avalanche conditions. Photo: GNFAC

  • On Sawtelle Peak, Island Park, when the clouds lifted we could see a crown of a snowmobiler triggered slide that occurred yesterday. It broke on the buried surface hoar and facets about 1.5 feet under the surface. Recent snow and wind-loading has created dangerous avalanche conditions. Photo: GNFAC

  • From facebook message: "Multiple remote triggers across this slope."

    Up Targhee Creek, near Lionhead Ridge. 1/18/24 Photo: R. Schlueter. 

  • From facebook message: "Multiple remote triggers across this slope."

    Up Targhee Creek, near Lionhead Ridge. 1/18/24 Photo: R. Schlueter. 

  • From facebook message: "Multiple remote triggers across this slope."

    Up Targhee Creek, near Lionhead Ridge. 1/18/24 Photo: R. Schlueter. 

  • This avalanche likely occurred in the last couple days. It was on a NE facing slope and is indicative of a weak and unstable snowpack. Photo: GNFAC

  • An avalanche on Ski Hill likely ran during the avalanche Warning last week (1/10/24). Photo GNFAC

  • Riders in Lionhead triggered a small avalanche 20' away while "cutting down a hill". Photo: J. Anderson

  • A small crown on an east facing that has been filled in by wind in Lionhead. Photo: Z. Moser

  • From obs: "We observed widespread shooting cracks on all ridges and all NE facing slopes. Cracks would propagate up to 200’ in front." O. Robinson

  • Cornices easily broke while walking near them and avalanched onto the slope below. The slope below had already avalanched from a remote trigger below the ridgeline. Photo: GNFAC

  • Top gray streak: Weak surface hoar buried by new snow. Second gray streak: Old surface hoar that is still visible. Photo: GNFAC

     

  • Shooting cracks that propagated in all directions, 50' wide. Photo: GNFAC

     

  • Shooting cracks while approaching Lionhead Ridge. Photo: GNFAC

     

Videos- Lionhead Range

WebCams


Rendezvous Ski Trail, W. Yellowstone

Snowpit Profiles- Lionhead Range

 

Select a snowpit on the map to view the profile image

Weather Forecast Lionhead Range

Extended Forecast for

10 Miles WNW West Yellowstone MT

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

    NOW until
    5:00pm Fri

    Winter Weather Advisory

  • Overnight

    Overnight: Snow.  Low around 20. Windy, with a southwest wind around 34 mph, with gusts as high as 49 mph.  Chance of precipitation is 80%. Total nighttime snow accumulation of 2 to 4 inches possible.

    Snow and
    Windy

    Low: 20 °F

  • Friday

    Friday: Snow, mainly before 3pm.  High near 24. Windy, with a southwest wind 28 to 32 mph, with gusts as high as 45 mph.  Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Windy. Snow
    then Snow
    Likely

    High: 24 °F

  • Friday
    Night

    Friday Night: Snow, mainly after 11pm. The snow could be heavy at times.  Low around 21. Breezy, with a south southwest wind 22 to 26 mph.  Chance of precipitation is 90%. New snow accumulation of 5 to 9 inches possible.

    Heavy Snow
    and Breezy

    Low: 21 °F

  • Saturday

    Saturday: Snow. The snow could be heavy at times.  High near 24. Wind chill values as low as -5. Windy, with a south southwest wind 30 to 37 mph, with gusts as high as 45 mph.  Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    Heavy Snow
    and Windy

    High: 24 °F

  • Saturday
    Night

    Saturday Night: Snow likely, mainly before 11pm.  Mostly cloudy, with a low around 4. Windy, with a south southwest wind 26 to 31 mph decreasing to 17 to 22 mph after midnight. Winds could gust as high as 36 mph.  Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Snow Likely
    and Windy
    then Chance
    Snow and
    Breezy

    Low: 4 °F

  • Sunday

    Sunday: Snow likely, mainly after 11am.  Mostly cloudy, with a high near 13. Southwest wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Snow Likely

    High: 13 °F

  • Sunday
    Night

    Sunday Night: Snow likely, mainly before 11pm.  Mostly cloudy, with a low around 2. Southwest wind 10 to 17 mph, with gusts as high as 25 mph.  Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Snow Likely

    Low: 2 °F

  • Monday

    Monday: Snow likely, mainly after 11am.  Mostly cloudy, with a high near 12. South southwest wind 10 to 17 mph, with gusts as high as 22 mph.

    Snow Likely

    High: 12 °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.

02 / 28 / 24  <<  
 
this forecast
 
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