Photos

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Cooke City, 2021-12-27

Skiers reported this natural avalanche on a wind-loaded slope on Henderson Mountain. They estimated the maximum crown depth to be 4-6' likely triggered by a cornice fall. Photo: W. Miller

Link to Avalanche Details
Cooke City, 2021-12-27

We are sad to report that on December 27th, two snowmobilers were caught and killed in an avalanche on Scotch Bonnet Mountain to the north of Cooke City. The avalanche broke 5’ deep and approximately 300’ wide on a southeast-facing slope.

Members of Park County Sheriff Search and Rescue arrived to assist with rescue and recovery efforts. 

Our deepest condolences go out to the victim’s friends and family, members of the group, and the search and rescue community. We will release further details as they become available.

Photo: B. Zavora

Cooke City, 2021-12-27

We are sad to report that on December 27th, two snowmobilers were caught and killed in an avalanche on Scotch Bonnet Mountain to the north of Cooke City. The avalanche broke 5’ deep and approximately 300’ wide on a southeast-facing slope.

Members of Park County Sheriff Search and Rescue arrived to assist with rescue and recovery efforts. 

Our deepest condolences go out to the victim’s friends and family, members of the group, and the search and rescue community. We will release further details as they become available.

Photo: B. Zavora

Cooke City, 2021-12-27

We are sad to report that on December 27th, two snowmobilers were caught and killed in an avalanche on Scotch Bonnet Mountain to the north of Cooke City. The avalanche broke 5’ deep and approximately 300’ wide on a southeast-facing slope.

Members of Park County Sheriff Search and Rescue arrived to assist with rescue and recovery efforts. 

Our deepest condolences go out to the victim’s friends and family, members of the group, and the search and rescue community. We will release further details as they become available.

Photo: B. Zavora

Cooke City, 2021-12-27

We are sad to report that on December 27th, two snowmobilers were caught and killed in an avalanche on Scotch Bonnet Mountain to the north of Cooke City. The avalanche broke 5’ deep and approximately 300’ wide on a southeast-facing slope.

Members of Park County Sheriff Search and Rescue arrived to assist with rescue and recovery efforts. 

Our deepest condolences go out to the victim’s friends and family, members of the group, and the search and rescue community. We will release further details as they become available.

Photo: B. Zavora

Lionhead Range, 2021-12-26

Dave Zinn of the GNFAC gets 3 layers breaking in his Extended Column Test. About 3 feet of snow fell in the last 4 days which got blown into wind slabs. The weight of the new snow is also creating instability on a weak layer of sugary facets near the ground. Photo: GNFAC

Northern Madison, 2021-12-26

From obs (12/25/21): "Cornice failure on beehive / bear basin ridge, ~9,200 ft. West side of ridge stripped clean, east side looked pretty loaded"

Bridger Range, 2021-12-25

A natural avalanche of wind-loaded snow released in the "Between the Peaks" area of Saddle Peak in the Bridger Range on Christmas Eve or early Christmas morning. Photo: D Wienstein

Link to Avalanche Details
Bridger Range, 2021-12-25

A natural avalanche of wind-loaded snow released in the "Between the Peaks" area of Saddle Peak in the Bridger Range on Christmas Eve or early Christmas morning. Photo: D Wienstein

Link to Avalanche Details
Bridger Range, 2021-12-23

We intentionally triggered this 6-8" deep wind slab on Saddle Peak on December 23, 2021, E aspect at 9,000'. It showed us that recently formed wind slabs were still reactive. This hard slab formed over low density new snow which made it unstable. While not large, these slides will easily push you down and can be harmful if they push you into hazardous obstacles or terrain traps. Photo: GNFAC

Link to Avalanche Details
Bridger Range, 2021-12-23

On December 23, 2021 we went out to Saddle Peak and dug three snowpits. We found a 2-3 foot deep, generally stable snowpack with a lack of unstable buried weak layers. Photo: GNFAC

Northern Gallatin, 2021-12-22

Pit from 12/22/21 at 9,850' on the NE face/shoulder of Mt. Blackmore. Snow depth was 111cm, first ECT was ECTN10 below the wind slab then ECTN22 on facets at 70cm. A second test was ECTN17 on that facet layer, then ECTP20 on depth hoar at 35cm. A third ECT was ECTP17 on the facets at 70cm, then a fourth ECT was another ECTP17.... I was moving into shallower snow as I got more unstable results, down to about 90cm HS. These weak layers are not easy to trigger or showing obvious signs of instability, but we will need to be careful when we get more snow, especially during large cumulative loading or big wind events. Photo: GNFAC

Northern Gallatin, 2021-12-22

North face of Mt. Blackmore on 12/22/21. South-southwest winds were moderate-strong and scouring more than loading it seemed like, but isolated slabs and whales of snow could be found. We did not get any drifts to crack or collapse. Fresh wind slabs were 2-4" thick, 1f-P hard, and not very continuous. Photo: GNFAC

Southern Madison, 2021-12-22

Bare ground on the ridge between Tepee Basin and Bacon Rind Creek. Nearby we found 4 ft deep drifts. 12/22/21. Photo: GNFAC

Southern Madison, 2021-12-22

An avalanche in Tepee Basin appears to have failed within or under the new snow around 12/15/21. Photo taken 12/22/21.

Photo: GNFAC

Link to Avalanche Details
Southern Madison, 2021-12-22

An avalanche in Tepee Basin that broke under new snow on facets near the ground. Likely occurred on 12/15/21. Photo taken 12/22/21.

Photo: GNFAC

Link to Avalanche Details
Southern Madison, 2021-12-22

Digging a snowpit in 4 feet of drifted snow in Tepee Basin (12/22/21). Photo: GNFAC

Lionhead Range, 2021-12-22

Riders in the Lionhead area observed 5-6 naturally occurring avalanches that likely failed on 12/15 at the tail end of a 3' snowstorm. Photo: S. Tyson

Link to Avalanche Details
Cooke City, 2021-12-21

From Beartooth Powder Guides: Saw this small natural avalanche today while coming back from the yurt. While being small on the relativity scale, it seems to have broke fairly deep.

Link to Avalanche Details
Cooke City, 2021-12-20

We generally stayed away from wind-loaded slopes today in Cooke City; however, we triggered this crack while crossing through a large drift of snow on Scotch Bonnet. This is an indicator of issues we will find on wind-loaded slopes right now. Photo: GNFAC