Photos

Noticed a small 8-10” wind slab pocket on the way in, looked like storm load but could have been sled triggered from the top. Photo: Anonymous 

Noticed a small 8-10” wind slab pocket on the way in, looked like storm load but could have been sled triggered from the top. Photo: Anonymous 

Small avalanche NE aspect near top of beaver. D1 natural trigger wind slab. Only observed avalanche from groomer trail. Photo: Z Bailey

Bottom of the Ramp, E aspect, 7900'. We found 24" of new snow which had nearly doubled the snowpack, leaving over five and half foot deep (HS 171) snowpack in this area. We got propagation (ECTP 24) at the storm snow interface. Photo: GNFAC

Ice crust on trees from freezing rain last Saturday Dec 28 now covered by rime ice.

Small wind slab in hyalite at the start to champaign slot, 7600’, WNW, ~8” crown. Photo: S Bonucci

Small wind slab in hyalite at the start to champaign slot, 7600’, WNW, ~8” crown. Photo: S Bonucci 

One fresh larger slide (R2/D2) at about 9,400' on a NE facing slope. It appeared to be natural (remote?), failed at the ground and was about 200' wide and ran for 200' the crown was 2-3' deep. Photo: A Newman

We were ski touring on the SW side of Mt. Henderson today, and noticed a large (natural?) avalanche on the NE aspect of Henderson.  First observed at around 1:15pm.  It appeared to be very fresh, possibly from a remote trigger this morning.  

2 photos attached.   A NE aspect, around 10,000'.

It looked to be 4-6' deep and about 500' wide.  And it failed on snow at/ near the ground.

Photo: B Fredlund 

We were ski touring on the SW side of Mt. Henderson today, and noticed a large (natural?) avalanche on the NE aspect of Henderson.  First observed at around 1:15pm.  It appeared to be very fresh, possibly from a remote trigger this morning.  

2 photos attached.   A NE aspect, around 10,000'.

It looked to be 4-6' deep and about 500' wide.  And it failed on snow at/ near the ground.

Photo: B Fredlund

It only took 20 minutes of skinning before we triggered a small avalanche in a terrain trap from a flat bench above. This slide (R3 D1) broke 150' wide, about a foot deep, and filled the creek bed below. Photo: GNFAC

It only took 20 minutes of skinning before we triggered a small avalanche in a terrain trap from a flat bench above. This slide (R3 D1) broke 150' wide, about a foot deep, and filled the creek bed below. Photo: GNFAC

It only took 20 minutes of skinning before we triggered a small avalanche in a terrain trap from a flat bench above. This slide (R3 D1) broke 150' wide, about a foot deep, and filled the creek bed below. Photo: GNFAC

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."

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."

Thick and robust ice crust layer widespread above white elephant.  Photo: Ride Rasmussen Style 

Occurred during the day on 12/28 Photo: GNFAC

Scotch Bonnet Depth to Weak Layer 28 Dec 2024

A group on the "Rip Curl" area of Woody Ridge south of Cooke City report ECTP1 test results failing on buried weak layers. Photo: B. Henry