Trip Planning for Island Park

as of 5:00 am
Today0″ | 30-68 W
Feb 24 0″ | 20-72 W
Feb 23 0″ | 10-50 NW
9885′     02/25 at 12:00
18.3℉
W - 34mph
Gusts 63 mph
8750′     02/25 at 12:14
67.2″ Depth
0.6″New
7710′     02/25 at 12:00
29℉
58″ Depth
Primary Problem: Persistent Weak Layer
Bottom Line: Strong winds have been blowing snow into thick drifts over an already unstable snowpack. Recent avalanches show an unstable snowpack exists and will not improve with wind-loading today (and heavy snow tomorrow). People can trigger large avalanches, especially on wind-loaded slopes, and potentially from flatter terrain below steep slopes. The best plan is to avoid riding on or below slopes steeper than 30 degrees.

Past 5 Days

Wed Feb 21

Considerable
Thu Feb 22

Considerable
Fri Feb 23

Considerable
Sat Feb 24

Considerable
Today

Considerable

Relevant Avalanche Activity

Lionhead Range
Hebgen Lake
Large whumps, Hebgen Lake
Incident details include images
Incident details contain video
Hebgen Lake
Elevation: 8,200
Aspect: NE
Coordinates: 44.8381, -111.3430
Caught: 0 ; Buried: 0

 A small whumpf in the skin track was followed by a massive one a few minutes later. I can count on one hand the number of times I got whumpfs in a skin track...rare indeed. The second one was so big it had us both deeply concerned. We peeled off the skin track after deciding to not cross a gully and soon found debris from a sizeable avalanche that released a couple days ago about 500' above us. We dug in the flank and had 100cm of snow, 60 cm new from last week. The snowfall during the Avalanche Warning, doubled the depth and more than doubled the snow water equivalent of the snowpack. It was a large load and avalanches are breaking underneath the new snow.

Karl was using his 100 cm long Norwegian Battle Saw (pic)...a bit overkill.


More Avalanche Details
Island Park
Centennials - Idaho
Multiple recent avalanche Centennials
Incident details include images
Centennials - Idaho
SS-N-R2-D2-O
Aspect: N
Coordinates: 44.5424, -111.7520
Caught: 0 ; Buried: 0

From obs. 2/11: "No details, came upon them while riding and making observations of the terrain. One was North-Northeast, the other was North-Northwest facing. Across the drainage from each other. Also, notice three other small avalanches on a west facing slope, about two miles east of the first two. All five were on slopes well over 30. In the centennial mountains, close to the continental on the Idaho/Montana border."


More Avalanche Details
Island Park
CENTENNIAL RANGE
Recent Naturals in Island Park
Incident details include images
CENTENNIAL RANGE
N-R2-D2
Aspect: E
Coordinates: 44.5278, -111.5680
Caught: 0 ; Buried: 0

From IG 2/10/24: “East aspect, southwest of island park from the blue creek trailhead.”


More Avalanche Details

Relevant Photos

Displaying 1 - 38
  • From obs: "No details, came upon them while riding and making observations of the terrain. One was North-Northeast, the other was North-Northwest facing. Across the drainage from each other. Also, notice three other small avalanches on a west facing slope, about two miles east of the first two. All five were on slopes well over 30. In the centennial mountains, close to the continental on the Idaho/Montana border."

  • From obs: "No details, came upon them while riding and making observations of the terrain. One was North-Northeast, the other was North-Northwest facing. Across the drainage from each other. Also, notice three other small avalanches on a west facing slope, about two miles east of the first two. All five were on slopes well over 30. In the centennial mountains, close to the continental on the Idaho/Montana border."

  • Riders snapped a photo of natural avalanche activity above Blue Creek in the Centennial Mountains. Photo: P Rockwell

  • A small avalanche that was triggered by riders on 02/08/2024. Photo: GNFAC

  • This avalanche was triggered by riders a few days ago. This was a small slope and broke 100' wide and 2-3' deep. Photo: GNFAC 

  • Snowmobilers in Hell Roaring Creek saw a few natural avalanches that happened in the last week. The exact date is unknown.  Photo: B. Schleicher

  • Snowmobilers in Hell Roaring Creek saw a few natural avalanches that happened in the last week. The exact date is unknown.  Photo: B. Schleicher

  • Snowmobilers in Hell Roaring Creek saw a few natural avalanches that happened in the last week. The exact date is unknown.  Photo: B. Schleicher

  • This on one of over 15 avalanches snowmobilers saw today, 01/30/2024. These avalanches likely happened on 01/29 or the morning of 01/30. Photo. N.

  • This on one of over 15 avalanches snowmobilers saw today, 01/30/2024. These avalanches likely happened on 01/29 or the morning of 01/30. Photo. N.

     

  • 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.

  • A rider triggered this avalanche while side-hilling across the bottom of the slope. The rider was able to quickly turn downhill and avoid the slide. No one was caught. Photo: Anonymous

  • A rider triggered this avalanche while side-hilling across the bottom of the slope. The rider was able to quickly turn downhill and avoid the slide. No one was caught. Photo: Anonymous

  • 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

  • Snowpit at the Head of Hellroaring Creek on 1/7/24. Note the two stripes of surface hoar in the pit wall.

  • We measured 16" of low-density snow equaling 0.7" of snow water equivalent at higher elevations in the Centennial Mountains of Island Park, ID. The new snow is sitting on a couple of layers of feathery surface hoar and a weak snowpack. It will not take much wind, settlement, or new snow to push the snowpack to the breaking point. Photo: GNFAC

  • New snow in Island Park made for beautiful views and heightened avalanche danger as the new snow fell on a snowpack riddled with weak layers. Photo: GNFAC

  • Doug Chabot walking off Lionhead Ridge to a snowpit site.

  • We snowmobiled up to 9,000' on Sawtelle peak, then skied to dig a couple pits. Our first pit was on an East aspect on a heavily wind loaded slope. The HS was 130cm (or 4.2 feet). There was 8" of new snow equal to 0.85" SWE, sitting over old consolidated snow that made up a slab over soft, weak facets about 50cm off the ground. We had ECTP24 x2 break on the old weak snow.... Photo: GNFAC

  • We snowmobiled up to 9,000' on Sawtelle peak on 12/23/23. The snow depth at 8,800' was 3-4 feet. Photo: GNFAC

  • Riders saw large surface hoar crystals while riding outside of Island Park. Photo. B.Schleicher

     

  • From IG on 12/10: "2 slides we triggered remotely in tepee yesterday"

  • From facebook message: "North facing slope 15 miles south of west Yellowstone probably 30ish degree slope. Probably 16-18 inch slab". Photo: T. Taubman

  • We met up with the Fugawee Snowmobile Club, Idaho Parks and Recreation, and Klim to install new beacon checkers at the trailhead in Island Park. Great work to the team! Photos: GNFAC

  • We met up with the Fugawee Snowmobile Club, Idaho Parks and Recreation, and Klim to install new beacon checkers at the trailhead in Island Park. Great work to the team! Photos: GNFAC

  • We met up with the Fugawee Snowmobile Club, Idaho Parks and Recreation, and Klim to install new beacon checkers at the trailhead in Island Park. Great work to the team! Photos: GNFAC

  • We met up with the Fugawee Snowmobile Club, Idaho Parks and Recreation, and Klim to install new beacon checkers at the trailhead in Island Park. Great work to the team! Photos: GNFAC

  • We met up with the Fugawee Snowmobile Club, Idaho Parks and Recreation, and Klim to install new beacon checkers at the trailhead in Island Park. Great work to the team! Photos: GNFAC

  • Fugawee Snowmobile Club Assembling New Beacon Checkers. Photo: Kent

  • Went to do maintenance on the Sawtelle Snowfall weather station at 8800 ft just off the Sawtelle Mountain Road. Continuous snowcover starts around 8000 ft. At 8800 ft there is ~20" of snow with a mix of hard crusts and weak facets. These weak layers near the ground will be something to watch once snows again. Photo: GNFAC

  • Went to do maintenance on the Sawtelle Snowfall weather station at 8800 ft just off the Sawtelle Mountain Road. Continuous snowcover starts around 8000 ft. At 8800 ft there is ~20" of snow with a mix of hard crusts and weak facets. These weak layers near the ground will be something to watch once snows again. Photo: GNFAC

  • Went to do maintenance on the Sawtelle Snowfall weather station at 8800 ft just off the Sawtelle Mountain Road. Continuous snowcover starts around 8000 ft. At 8800 ft there is ~20" of snow with a mix of hard crusts and weak facets. These weak layers near the ground will be something to watch once snows again. Photo: GNFAC

  • From IG: “Pine creek today, some small wind slabs and a full depth wet slide off black mountain”

  • From IG: “Pine creek today (10/21), some small wind slabs and a full depth wet slide off black mountain”

  • From obs. "Was out alpine climbing today and observed the north face of Blackmore had slid already."

  • Get your tickets and online bid for items HERE!

Videos- Island Park

Snowpit Profiles- Island Park

 

Select a snowpit on the map to view the profile image

Weather Forecast Island Park

Extended Forecast for

10 Miles ESE Lakeview MT

High Wind Warning until February 26, 05:00pmWinter Storm Warning February 25, 11:00pm until February 26, 11:00pmClick here for hazard details and duration High Wind Warning Winter Storm Warning
  •  High Wind Warning until February 26, 05:00pm

    NOW until
    5:00pm Mon

    High Wind Warning

  • This
    Afternoon

    This Afternoon: A 30 percent chance of snow, mainly after 4pm.  Patchy blowing snow. Mostly cloudy, with a high near 29. Breezy, with a south southwest wind 20 to 26 mph, with gusts as high as 38 mph.  Total daytime snow accumulation of less than one inch possible.

    Chance Snow
    and Patchy
    Blowing Snow

    High: 29 °F

  • Tonight

    Tonight: Snow likely, mainly after 4am.  Widespread blowing snow, mainly after 11pm. Mostly cloudy, with a low around 24. Breezy, with a south southwest wind 25 to 28 mph, with gusts as high as 43 mph.  Chance of precipitation is 60%. New snow accumulation of 1 to 3 inches possible.

    Snow Likely
    and Blowing
    Snow

    Low: 24 °F

  • Monday

    Monday: Snow. The snow could be heavy at times.  Widespread blowing snow. High near 27. Windy, with a south southwest wind 30 to 33 mph, with gusts as high as 47 mph.  Chance of precipitation is 100%. New snow accumulation of 6 to 10 inches possible.

    Heavy Snow
    and Blowing
    Snow

    High: 27 °F

  • Monday
    Night

    Monday Night: Snow.  Widespread blowing snow, mainly before 8pm. Low around 6. Wind chill values as low as -10. Breezy, with a southwest wind 14 to 24 mph becoming north northwest after midnight. Winds could gust as high as 37 mph.  Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Snow and
    Blowing Snow

    Low: 6 °F

  • Tuesday

    Tuesday: Snow.  High near 14. West northwest wind 10 to 17 mph, with gusts as high as 26 mph.  Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    Snow

    High: 14 °F

  • Tuesday
    Night

    Tuesday Night: Partly cloudy, with a low around -2. West northwest wind 10 to 18 mph becoming south southwest after midnight. Winds could gust as high as 28 mph.

    Partly Cloudy

    Low: -2 °F

  • Wednesday

    Wednesday: A 30 percent chance of snow.  Mostly cloudy, with a high near 17. South southwest wind 13 to 17 mph, with gusts as high as 32 mph.  Little or no snow accumulation expected.

    Chance Snow

    High: 17 °F

  • Wednesday
    Night

    Wednesday Night: A chance of snow.  Mostly cloudy, with a low around 15. South wind 13 to 17 mph, with gusts as high as 32 mph.

    Chance Snow

    Low: 15 °F

The Last Word

On Thursday Ian rode in the Independence Mine area (up the Main Boulder, outside our advisory area) to check out the snowpack conditions before the Sweet Grass County Recreation Association Poker Ride. Watch his video for a snowpack update. Avoiding riding on and staying out from under slopes steeper than 30 degrees would be a wise choice if you’re headed up to that area.

02 / 24 / 24  <<  
 
this forecast
 
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