Photos

Displaying page 1 of photos 1 - 20 of 77
Lionhead Range, 2018-12-11

The Lionhead area near West Yellowstone has the shallowest and weakest snowpack in our forecast region. The bottom half of the pack consists of weak, sugary facets. This well developed weak layer produced unstable results in stability tests on any slope that had wind drifted snow. With more snow and wind in the forecast, this area will experience increasingly unstable conditions. Photo GNFAC  

Northern Gallatin, 2018-12-11

This avalanche originated from the ridgetop and ran down the east face of Mt Blackmore. Winds were loading slopes quickly. This avalanche occurred in the morning right after we arrived in the bowl. Photo: G. Antonioli

Link to Avalanche Details
Northern Gallatin, 2018-12-11

This avalanche released while we were skinning up the ridge. New snow and strong winds created instability under the cornice. Photo: G. Antonioli

Link to Avalanche Details
Northern Gallatin, 2018-12-10

Climbers in Hyalite triggered a small wind slab while hiking. From the email: "No consequences his time, but it is a great reminder of how quickly conditions can change when you're hiking. In the wrong terrain, a slide like this could be really bad." Well said. Photo: P. Dobson

Link to Avalanche Details
Northern Gallatin, 2018-12-10

Isolated wind slabs in Hyalite cracking under the weight of a skier. Photo: V. Ortiz

Northern Gallatin, 2018-12-10

Photo: @msubackcountryclub

Cooke City, 2018-12-09

We found 4' of stable snow on the slopes underneath Wolverine (NE facing, 8500').  Photo: GNFAC

Cooke City, 2018-12-09

This loose snow avalanche originated in the summit rocks and entrained the few inches of new snow. Photo: GNFAC

Cooke City, 2018-12-09

This small wind slab on the NE facing slopes of Scotch Bonnet likely released a week ago after the strong winds blew. Photo: GNFAC

Southern Gallatin, 2018-12-08

Surface hoar crystals growing on top of a thin, faceted snowpack in the Southern Gallatins. Photo: B. VandenBos

Bridger Range, 2018-12-08

A skier in the Northern Bridgers found variable conditions on Saturday, with wind scouring above treeline, isolated wind slabs below treeline, and widespread faceting with the recent cold and dry weather. "Skiing was highly variable, ranging from all loose facets to breakable wind slab overlying facets to hard slab/sastrugi." Photo: G. Antonioli

Northern Gallatin, 2018-12-08

Photo: S. Hennessey

Link to Avalanche Details
Cooke City, 2018-12-07

A skier outside of Cooke City observed this natural avalanche on a north facing slope up Sheep Creek. The slide appears to be the result of heavy wind loading. Photo:B. Fredlund 

Link to Avalanche Details
Southern Madison, 2018-12-05

This small wind slab was triggered by skiers descending from Imp Peak in the southern Madison Range. Although small, this slide is bull's eye information that larger slides are possible on wind loaded slopes. Photo: S. Knowles 

Link to Avalanche Details
Northern Gallatin, 2018-12-04

Wind loads were easy to trigger. This one was triggered on purpose up Maid of the Mist in Hyalite. Photo: A. Peterson

Link to Avalanche Details
Northern Gallatin, 2018-12-04

Wind slabs were easily triggered. Although small in size, they indicate that larger slopes would have larger avalanches. Photo: A. Peterson

Link to Avalanche Details
Bridger Range, 2018-12-04

Strong winds on Tuesday (12/4) drifted recent low density snow into thick slabs at ridgelines, and mid to lower elevations in the Bridger Range. Photo: GNFAC

Bridger Range, 2018-12-04

Strong winds on Tuesday (12/4) drifted recent low density snow into thick slabs at ridgelines, and mid to lower elevations. Photo: GNFAC

Northern Madison, 2018-12-04

From some skiers: "We encountered veey localized loading that easily fractured and propagated uphill on a south aspect." Photo: S. Reinsel

Link to Avalanche Details
Northern Madison, 2018-12-04

From some skiers: "We encountered veey localized loading that easily fractured and propagated uphill on a south aspect." Photo: S. Reinsel

Link to Avalanche Details