Two Point release avalanches on south slope of Two Top. 1/30/25. Photo: K. Allred
Trip Planning for Island Park
Primary Problem: Wind Slab
Bottom Line: Avalanches are unlikely across the forecast area. While conditions are stable overall, isolated instabilities may exist within recently drifted snow and wet snow later this afternoon. These considerations are most relevant in steep and consequential terrain where a small avalanche could be dangerous. Adhere to the fundamentals of avalanche safety–beacon, shovel, probe, one at a time on steep slopes and keep eyes open for signs of isolated instability.Past 5 Days
Fri Mar 7
Moderate
Moderate
Sat Mar 8
Moderate
Moderate
Sun Mar 9
Moderate
Moderate
Mon Mar 10
Low
Low
Tue Mar 11
Low
Low
Relevant Photos
Displaying 1 - 40
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Wide spread layer of Surface Hoar mid and upper elevations Two Top area
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Shooting crack in a fresh wind slab near Mt Jefferson
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North facing pit in Hellroaring Creek, Centennials
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North facing snow profile Hellroaring Creek, Centennials
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South facing snowpit Hellroaring creek, Centennials
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S facing snow profile from Hellroaring Creek in Centennials
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The GNFAC weather station at the top of Sawtelle provides wind, temperature and relative humidity information for forecasting (when it's not covered in a foot of rime ice. Photo: GNFAC
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Photo: GNFAC
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From the top of Sawtelle. Photo: GNFAC
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Riders in the Centennial Mountains experienced almost constant whumphing at higher elevation and saw a couple of days old avalanche on a windl-oaded east north east facing slope. Photo: R. Gravett
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Ice crust on trees from freezing rain last Saturday Dec 28 now covered by rime ice.
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From obs on 12/29: "On our way out near the cabin I cut a line close to a creek to see if I could trigger something."
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From obs on 12/29: "On our way out near the cabin I cut a line close to a creek to see if I could trigger something."
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Thick and robust ice crust layer widespread above white elephant. Photo: Ride Rasmussen Style
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Plumes of drifting snow in the Bridger Range as strong winds blasted the mountains. Photo: GNFAC
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De-rimed Sawtell anemometer
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Rock Creek natural avalanche
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NE facing IP snowpit
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E facing IP snowpit
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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
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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
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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
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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
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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
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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
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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
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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
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WE facing snow at 8100 ft Cabin Ck
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Cabin Creek snow cover
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SE facing snow Cabin Creek
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N facing snow Cabin Creek, 9000 ft
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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
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Cracking on old, faceted, October snow hundreds of feet long. North facing near treeline. Photo: BSSP
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Intentional, human-triggered avalanche by a ski patrol breaking at the ground on a north facing slope near treeline. Photo: BSSP
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Sawtelle snowpack. Photo: GNFAC
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Snowpit at Bridger Bowl on 11/5. Photo: B. VandenBos
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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
Videos- Island Park
Weather Stations- Island Park
Weather Forecast Island Park
Extended Forecast for10 Miles ESE Lakeview MT
Winter Weather Advisory March 13, 06:00am until March 14, 06:00amClick here for hazard details and duration Winter Weather AdvisoryToday
High: 34 °F
Mostly Sunny
then Mostly
Cloudy and
BreezyTonight
Low: 28 °F
Breezy.
Chance Snow
then Heavy
SnowThursday
High: 30 °F
Heavy Snow
and BreezyThursday Night
Low: 18 °F
Snow Showers
Friday
High: 23 °F
Snow Likely
Friday Night
Low: 15 °F
Chance Snow
Saturday
High: 24 °F
Chance Snow
then SnowSaturday Night
Low: 14 °F
Snow Likely
Sunday
High: 28 °F
Snow Likely
and Windy