Trip Planning for Island Park

as of 5:00 am
Today0″ | NA
Dec 20 0″ | NA
Dec 19 0″ |
9885′     12/21 at 8:00
32.1℉
NW - 0mph
Gusts 0 mph
8750′     12/21 at 07:54
36.9″ Depth
0.0″New
7710′     12/21 at 07:00
29℉
28″ Depth
Primary Problem: Persistent Slab
Bottom Line: Triggering, large, dangerous avalanches is still possible, but they have become a bit less likely. Persistent Slab avalanches remain a serious concern. Weak layers are widespread in the middle of the snowpack and earlier this week we saw avalanches breaking on them. A large collapse yesterday in the Bridger’s reminds us that similar slides remain possible.

Past 5 Days

Tue Dec 17

Considerable
Wed Dec 18

Considerable
Thu Dec 19

Considerable
Fri Dec 20

Considerable
Today

Moderate

Relevant Avalanche Activity

Island Park
Rock Creek Basin
Widespread weak layer Island Park
Incident details include images
Rock Creek Basin
SS-NC-R2-D1-O
Elevation: 9,200
Aspect: NE
Coordinates: 44.5657, -111.4810
Caught: 0 ; Buried: 0
More Avalanche Details
Island Park
Two Top
Windslab above surface hoar near W. Yellowstone/IP
Incident details include images
Two Top
SS-AMu-R2-D1-O
Coordinates: 44.6104, -111.3030
Caught: 0 ; Buried: 0

Small windslab triggered on approach for inspection. Failure interface had 5 mm Surface Hoar. Soft slab, remote propagation onto the adjacent slope. Debris covered about half of the road bed.


More Avalanche Details

Relevant Photos

Displaying 1 - 27
  • Plumes of drifting snow in the Bridger Range as strong winds blasted the mountains. Photo: GNFAC

  • De-rimed Sawtell anemometer

  • Rock Creek natural avalanche

  • NE facing IP snowpit

  • E facing IP snowpit 

  • From IG: On 12/15 "Storm slab broke about 200’ above us as skinning up the hallway coming from the north side on the throne." Photo: Anonymous

  • Small windslab triggered on approach for inspection. Failure interface had 5 mm Surface Hoar. Soft slab, remote propagation onto the adjacent slope. Debris covered about half of the road bed.

    Photo: J Hambelton 

  • Small windslab triggered on approach for inspection. Failure interface had 5 mm Surface Hoar. Soft slab, remote propagation onto the adjacent slope. Debris covered about half of the road bed.

    Photo: J Hambelton

  • Small windslab triggered on approach for inspection. Failure interface had 5 mm Surface Hoar. Soft slab, remote propagation onto the adjacent slope. Debris covered about half of the road bed.

    Photo: J Hambelton

  • Gusty winds transporting snow in Taylor Fork on Saturday. Triggered a 4-5 inch deep wind slab that propagated about 50 ft at the top of a north east facing slope at 9,500 ft.

    Photo: JP

  • We are grateful for our partnership with the Friends of the Gallatin National Forest Avalanche Center. It is always a good time to get out in the field with our education coordinator, Shannon. Photo: GNFAC

  • The snow depth was 60-70 cm (2-2.5 feet) at the upper elevations of the Big Springs Loop around the Black Canyon area in Island Park. Photo: GNFAC

  • Surface hoar and near surface facets are now capped by this weekend's snow. The layers are buried 2-4" deep in the Black Canyon area of Island Park. Photo: GNFAC

  • WE facing snow at 8100 ft Cabin Ck

  • Cabin Creek snow cover

  • SE facing snow Cabin Creek

  • N facing snow Cabin Creek, 9000 ft

  • Big Sky Ski Patrol triggered this avalanche during mitigation work in The Wave on 11/26/24... "2-3' deep on an ice crust just above the ground with a 2# shot in the Upper rodeo. Volume was limited as most of the snow was loaded just underneath the cornice, but still produced a sizeable size 2... Other paths in the Lenin region ran meaty wind slabs, full track with no significant step downs." Photo: BSSP

  • Cracking on old, faceted, October snow hundreds of feet long. North facing near treeline. Photo: BSSP

  • Intentional, human-triggered avalanche by a ski patrol breaking at the ground on a north facing slope near treeline. Photo: BSSP

  • Sawtelle snowpack. Photo: GNFAC

     

  • Snowpit at Bridger Bowl on 11/5. Photo: B. VandenBos

  • From e-mail: "Photo attached from near top of hyalite peak, 11/2. Cracking in recent hard wind slab, I had to really jump hard to make this. Walked on many other hard slabs that were well bonded. Highly variable snowpack. I think you'd be most likely to get into trouble by popping out a small hard slab pocket like this and getting magic carpeted into some thinly covered terrain." Photo: B. VandenBos

  • From obs: "1-3 mm faceting in front of the Montage. Clear skys and mid 20 temps"

  • On October 17, rain turned to snow and blanketed the mountains of southwest Montana with a fresh coat of snow. Photo: Yellowstone Club Webcam

  • On October 17, rain turned to snow and blanketed the mountains of southwest Montana with a fresh coat of snow. Photo: Bridger Bowl Webcams

  • The 26th annual fundraiser for the Friends of the GNFAC is October 25 at the Emerson Cultural Center. More info and tickets at: https://events.eventgroove.com/event/Powder-Blast-2024-101627

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

  • Today

    Today: Mostly cloudy, with a high near 32. South wind 7 to 9 mph.

    High: 32 °F

    Mostly Cloudy

  • Tonight

    Tonight: A chance of snow between 10pm and 3am.  Mostly cloudy, with a low around 19. South wind 7 to 14 mph, with gusts as high as 23 mph.  Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Chance Snow

  • Sunday

    Sunday: A 20 percent chance of snow.  Partly sunny, with a high near 26. South wind 6 to 9 mph.

    High: 26 °F

    Slight Chance
    Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly after 11pm.  Mostly cloudy, with a low around 21. South wind around 8 mph.  Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 21 °F

    Snow Likely

  • Monday

    Monday: Snow.  High near 28. Southwest wind 6 to 9 mph.  Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

    High: 28 °F

    Snow then
    Snow Likely

  • Monday Night

    Monday Night: A 20 percent chance of snow before 11pm.  Mostly cloudy, with a low around 21. South wind 7 to 9 mph.

    Low: 21 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of snow, mainly after 11am.  Mostly cloudy, with a high near 30. Southeast wind around 10 mph.  New snow accumulation of less than a half inch possible.

    High: 30 °F

    Chance Snow

  • Tuesday Night

    Tuesday Night: Snow.  Mostly cloudy, with a low around 18. East southeast wind around 10 mph becoming northwest in the evening.

    Low: 18 °F

    Snow

  • Christmas Day

    Christmas Day: A chance of snow, mainly before 11am.  Partly sunny, with a high near 25.

    High: 25 °F

    Chance Snow

The Last Word

12 / 20 / 24  <<  
 
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