Photos

On 3/12/22 near Cooke City we saw many natural and snowmobiler triggered avalanches that broke 6-10" deep. Snow over the past week fell on a hard melt-freeze crust. Last night, 4" of new snow with moderate wind created unstable wind slabs that broke wide on the buried crust. Photo: GNFAC

Small, long running skier triggered wind slab avalanche on Mt. Blackmore in Hyalite Canyon (3/10/22). Photo: M. Carey

From obs (3/10/22) : "Today we triggered a small pocket of wind loaded snow while ascending (bootpacking) the East ridge of Blackmore. The convexity broke about 1 foot down and propagated about 10 feet wide. It ran the entire distance of the East face ~800’."

Photo: C. Firer

The yellow circle shows the skier triggered soft slab avalanche that was seen on the approach to Mt Blackmore. Photo: N. Roe

At Lionhead, east wind was blowing up the normal starting zones and moving snow. Once it switches westerly the wind loads will create instability. There is 10-12" of powdery snow to blow around. Photo: GNFAC

Thin wind slab avalanche on a NE aspect of Henderson Mountain. Approx 100ft wide. Likely broke on 3/8/22 observed 3/9/22. Photo: GNFAC

As we moved along a steep break over near Lick Creek, we triggered shooting cracks and an avalanche on a small test slope. The avalanche slide on a hard melt-freeze crust formed last week. Photo: GNFAC

As we moved along a steep break over near Lick Creek, we triggered shooting cracks and an avalanche on a small test slope. The avalanche slide on a hard melt-freeze crust formed last week. Photo: GNFAC

This slide was seen on 3/6/22 and appears to have been triggered by a snowmobiler. It is on the north aspect of Scotch Bonnet Mtn. near Cooke City. Photo: S. Strenge

Avalanches in Pebble Creek near Cooke City. Likely occurred on March 3rd, due to the very warm temps. Easterly aspects, around 8900'.  Approx 1' deep and 50-100' wide. Photo: B. Fredlund

Avalanches in Pebble Creek near Cooke City. Likely occurred on March 3rd, due to the very warm temps. Easterly aspects, around 8900'.  Approx 1' deep and 50-100' wide. Photo: B. Fredlund

From obs (3/6/22): " Skinned out to Alex Lowe peak today. Dug a pit on a northeast aspect below the east face of the peak. Got an ECTP 24 to break around 20 cm down. The slab was a knife hard sun/wind crust. Continued up avoiding areas where we noticed that bullet hard crust under the surface. On our decent we skied off the east ridge below the summit and on a skit cut got some shooting cracks, and a small wind slap to propagate but not slide. Skied the rest of the way down and didn’t notice anything else." Photo: S. Lipsteuer

Wet slides occurred near Quake Lake on 3/3 or 3/4. Photo. T. Hansen

Large wet slabs happened in Cabin Creek on 3/3 or 3/4/22. Photo: T. Sizemore

Location of an avalanche that skiers remote triggered on Friday 3/4 near Cooke City, SE aspect at 8600' elevation.

Avalanche seen on 3/4/22 ran within previous 48 hours. South of Cooke City in Hayden Creek. Photo: S. Gill

From obs: "An avalanche ran on The NE face of Mineral Mountain. Debris ran approximately 1600’. I couldn’t get good enough eyes to see the trigger type but there was a possible ski track near the flank on mid slope.  but I couldn’t confirm. Debris looked frozen this morning and it likely occurred on 3/3/22".

Photo: R. Youngbar

Pinwheeling on Chimney Rock. 3/3/22. Photo: R. DeSilva

From observation 3/3/22: "Observed multiple avalanches on E aspect, 8500-9400’, one of which occurring this afternoon, triggered by a pine marten... 2’ crown, 9400’, S of Midway. Failed on NSF down 30-60cm." Photo: S. Gill

From email 3/3/22: "From Woody Ridge today I observed 3 fresh natural slab avalanches that all occurred on the other side of the valley around 11am.  These slab avalanches were 1-2' deep and up to around 100' wide.  Attached photo of one, on an east aspect of a place known locally as Hunter's Knob." Photo: B. Fredlund